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THIS Is The Fastest Way To Get Dementia...The 6 Science-Backed Brain Fixes!

December 26, 2025 / 01:05:16

This episode focuses on brain health, featuring discussions on exercise, diet, and neuroplasticity with insights from neuroscientists. Key topics include the importance of aerobic exercise, the Mediterranean diet, and the effects of sleep on cognitive function.

The host emphasizes the role of exercise in enhancing brain function, citing research that shows aerobic activity improves mood and memory. The conversation highlights how even low-fit individuals can benefit from regular physical activity.

Dietary choices are also discussed, particularly the Mediterranean diet's positive impact on brain health. The host mentions the dangers of sedentary behavior and insufficient sleep, explaining how these factors can lead to cognitive decline.

Neuroplasticity is presented as a powerful concept, illustrating that individuals can change their brain's structure and function through learning and experience. The episode encourages listeners to engage in activities that promote brain health.

Overall, the episode serves as a guide for listeners looking to improve their mental well-being through lifestyle changes.

TL;DR

This episode discusses brain health, emphasizing exercise, diet, and neuroplasticity for cognitive improvement.

Video

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I think everybody needs to listen to
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this episode if they want to start 2026
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properly. If there's one thing I've
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learned that's really stayed with me
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this year, it's from speaking to some of
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the world's leading minds about our
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brain, which might just be the most
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powerful asset that we all have. You
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know, if you listen to the Diary of a
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SEO, you're probably listening because
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you're trying to get something, whether
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it's information, inspiration, maybe
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entertainment, all of which because
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you're striving towards some kind of
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goal. And it's dawned on me this year
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because I've interviewed so many
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incredible neuroscientists that this all
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starts with having a healthy brain.
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Because all of our thoughts, our
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feelings, our relationships, our
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memories, our chance of having a future
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start in the brain. So, in this special
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Christmas episode, we're going to focus
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on the brain. How you can have the most
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fundamentally healthy brain so you can
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live the most fundamentally meaningful
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life. I've been through all the episodes
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where we've talked about the brain and
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I've looked at the moments that you
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shared and replayed the most. and the
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moments that added the most value to
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your life. And I've put all of them into
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this episode today.
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>> Do you remember the first time you saw a
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human brain?
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>> I do.
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>> Did it change how you think about your
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own brain?
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>> It changed my life because I was like, I
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want to study that. That is the coolest
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thing that I've ever seen in my whole
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life. It was life-changing.
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>> I say that because we, you know, at the
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start of this conversation, we said that
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most of us don't appreciate our brain. A
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lot of people don't even realize it's
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there. But the minute I had a brain scan
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one day, and that brain scan
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>> really changed my life because seeing my
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own brain for the first time,
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>> it was the push that I needed
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>> to start caring more about how my
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decisions and behaviors are impacting
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it. So, let's talk about how I can make
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that ball of tofu in my head, super
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healthy, big, fat, and fluffy. You you
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talked about exercise earlier on, but we
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didn't really dig dig into exactly what
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you mean by exercise cuz exercise, I
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think, is multifaceted in its
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definition. What kind of exercise should
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I be doing to make my ball of tofu in my
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head great?
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>> Yeah.
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>> Optimal.
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>> Mhm. Well, all the research shows that
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the best kind of exercise that you can
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do is anything that gives you aerobic
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activity that is getting your heart rate
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up. So that that goes for, you know,
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power walking will get your heart rate
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up. So soccer, so many different things.
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Name your activity. So many people want
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to say, "Oh, my favorite activity, will
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that work?" And I always just say, "Is
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it is your heart rate up when you're
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doing it?" If the answer is yes, then
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yeah, that that works great. We know
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that that level of aerobic activity is
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critical because that's going to release
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that growth factor maximally to get into
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your hippocampus. Uh that will grow
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those new brain cells. how much?
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>> So, um I have an answer to that. So, um
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we did two different experiments in my
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lab. One in um low fit people, people
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that are really not exercising very much
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at all, less than 30 minutes um um in
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the last three three weeks you you've uh
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moved your body. And um we asked what
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could we see any behavioral improvement
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in your memory function from your
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hippocampus or your uh ability to shift
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and focus attention if we ask you to
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move your body in an aerobic way for two
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to three times a week and we
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collaborated with a spin class. So
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clearly very aerobic. And what we found
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was in those people that did
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successfully do two to three times a
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week of 45minute aerobic activity, their
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mood got significantly better, their
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memory function got better, and their
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ability to shift and focus attention got
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significantly better. So that gives a
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little bit of a guideline for low fit
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people. Two to three times a week can
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start to give you some of those some of
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those cognitive changes. But you don't
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look low fit. So let me let me answer
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the question you're about to ask me with
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like what about me? I I exercise pretty
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regularly and um how much how much do I
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need? So to answer that question, we
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went to another spin studio and we said
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look, we're going to give you free
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classes. You could exercise as much as
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you want in this in this um at this
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studio and uh um go up to seven times a
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week. And the control was just stay the
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same. You know, you they were they were
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working out twice a week at at the
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studio
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>> and Troll was the other group that what
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you were testing them against.
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>> Yes. Exactly.
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>> And so what we found was
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basically every drop of sweat counted.
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The more you exercise, the more change
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in your brain. We noted both your
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hippocample function, prefrontal
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function, and mood. if you you were
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already getting benefit, you know,
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you're already going twice a week, but
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the more you did, the more brain changes
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you got. So that that doesn't give the
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formula that I would like, but we were
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heading in that direction, which is part
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of one of the questions that I want to
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answer. But I love to leave people with
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the idea that every drop of sweat counts
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for building your brain into the big fat
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fluffy brain that you really want.
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And then in the real world, again,
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making it super um real for people.
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>> Yeah.
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>> How how does that change how I show up?
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>> Yeah. if you allow it to should have a
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beautiful effect on your mindset. Um
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that your mindset around um
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how often should I take wake up and 30
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minutes early and do that walk before I
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start my day or uh accept the the
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invitation to go uh walk the dog with
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with a neighbor. Um it's not an
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obligation. It is something that you're
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doing for yourself. It is going to have
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direct benefits on that ball of tofu, as
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you call it, in your head. It's going to
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make it work better. And and I mean, I
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think the most immediate thing that I
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benefit from every single day is the
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mood boost that you get from that
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serotonin, dopamine, nor adrenaline that
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gets released every time you move your
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body.
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>> I always think that because obviously I
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do a lot of podcasting and it's I'm
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super reliant on my brain being attached
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to my mouth and sometimes I notice that
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it's not. You know what I mean? like
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sometimes I'm notic
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from from your and also I speak on stage
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sometimes. So I've often asked myself
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cuz I saw Tony Robbins
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>> the speaker one day on a trampoline
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before he goes up on stage.
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>> I ask myself okay should I be doing a
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workout in my green room before I go up
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on stage for a big talk or presentation?
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>> You think I should?
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>> Oh yeah absolutely. What's the basis of
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that in science and neuroscience?
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>> Uh it's the basis is that immediate
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effect. So there's three key effects
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that we know happen every time you move
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your body. First one is mood. You're
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going to get your dopamine, your
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serotonin up. Um second is focus and
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attention. So so a single workout isn't
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going to make more synapses in your
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prefrontal cortex, but the prefrontal
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cortex uses dopamine. And so um it's
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clear that even a single workout can
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make your prefrontal cortex work better
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in terms of focus and attention. Also
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very important anytime you're speaking.
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And the third is reaction time. Your
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reaction time, you know, motor your your
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your working your motor cortex when you
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move your body. And your response and
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reaction time is significantly shorter
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after a even a single workout compared
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to if you just don't work out and sit
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sit um alone. So great great things to
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do. A great thing to do before you you
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stand up and speak.
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>> What about coffee?
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>> I I I'm trying to figure out if coffee
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is good for my brain, bad for my brain.
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I've had a couple of mixed messages
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around the impact it might be having.
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>> Yeah. You know, caffeine is a stimulant
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and uh people respond to that kind of
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stimulant uh in different ways. Over
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stimulation with caffeine is is not good
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for your be able your ability to put
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words together. You know, this is where
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I turn to a a main theme in in my book
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healthy brain happy life with this which
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is self-experimentation
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for you. How what can you titrate your
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coffee to see what level of coffee is
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best for whatever your podcast or you're
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giving a talk? The other thing that can
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work similarly to coffee that that I've
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started uh and that I do every morning
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is um hot cold contrast showers because
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that cold that you shower on yourself
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after the heat um stimulates adrenaline
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in you. a natural adrenaline. It wakes
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you up and okay, it was painful the
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first kind of few times I tried it, but
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then you get addicted to it and I have
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forgotten to do it and gotten back in
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the shower just to douse myself with
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cold water because I feel better when I
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do that for for you know first thing in
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the morning. So, lots of different
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things that one can explore with. Okay,
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on the other side of the coin then, what
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are some of the central behaviors that
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people do that destroy their brain?
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>> Well, sedentary behavior is one of them.
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Um, not getting enough sleep is
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critical. We haven't talked about sleep
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yet. Sleep is so important for normal
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functioning of the brain. I like to
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scare my students by saying that um you
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know in torture situations if you
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deprive a person of sleep for too long
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they literally die. They they they die.
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You cannot function if you are deprived
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of sleep for too many hours in a row.
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It's that critical. Yet we don't we we
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happily, you know, watch too much
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Netflix at night and and and and get
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only 5 hours of sleep when we could have
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had eight. So um what's happening
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exactly? Why is it so important? Well,
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there's um there's so many different
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things. I'm gonna I'm gonna say two. One
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is that we know that in regular um um
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healthy sleep, there is activity in the
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hippocampus that helps you strengthen
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the memories that you have formed in
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that previous day. It's called
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consolidation and it's so important. If
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you shorten that, if you don't get
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enough, you are not consolidating your
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normal everyday memories. And second, it
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is uh the time during sleep when all the
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metabolites, all that garbage that your
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brain is producing because all
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biological cells produce garbage, it
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gets kind of um cleaned up um through
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the cerebral spinal fluid that that is
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flowing through your brain. And if you
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do not get enough sleep, you build up
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garbage metabolites in your brain. It's
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like you have a gunky brain. And do you
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feel like I feel like I have gunk in my
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brain when I don't sleep enough. That is
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exactly what is what is happening.
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>> Well, when you think about um things
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that we consume, you know, like food and
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drink and alcohol and all these kinds of
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things, is there is there anything that
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if I'm trying to have an optimal brain,
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I should be
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>> Yeah.
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>> having or not having?
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>> Yeah. Well, so um I think the most
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evidence is around the benefit of the
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Mediterranean diet which is basically
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all healthy uh um kind of organic not
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organic but nonprocessed is the word I
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was trying to think of things to eat
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that are very very colorful. There is so
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much evidence about how good that is
00:11:39
generally for the brain that that is my
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go-to. Like what should I eat? Well, is
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it on the Mediterranean diet? If it is,
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then go ahead. If it's too processed,
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>> only do it just a little bit.
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>> Is it true that if we have less friends,
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if we have less strong relationships, if
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we're lonely,
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>> then our brain will shrink and is more
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prone to dementia and Alzheimer's and
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things like that. Yes, we are social
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creatures and um there are uh really
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powerful studies that have shown the
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correlation between the number of social
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connections that we have including just
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saying hello to the barista at
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Starbucks. It's not a close friendship
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that you develop over 30 years. It's
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it's just how many people you interact
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with and greet and longevity. The more
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people you are regularly interacting
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with, the longer you are living overall
00:12:34
longevity. But if you go into brain
00:12:37
health, absolutely it's also very very
00:12:39
healthy for you. It also brings
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happiness. So uh friend and colleague of
00:12:45
mine um Robert Wallinger uh studied um
00:12:48
what makes people happy. The study
00:12:50
started in the 20s, the 1920s and in
00:12:53
Harvard. And after all of those many
00:12:55
many many decades, the answer is what
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brings happiness is the strength of your
00:13:02
social connections. So it makes you
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happier. It makes you live longer and
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and uh yes, loneliness on the on the um
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flip side causes stress uh long-term
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stress that that damages the brain and
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uh yeah, in the long term can can make
00:13:17
it smaller and uh less healthy.
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>> Here's the fifth most replayed moment.
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When I asked you before this
00:13:23
conversation started rolling what you're
00:13:25
really excited about at the moment, your
00:13:27
response to me was there was a few
00:13:28
things, but one of them which lit up
00:13:30
your face was creatine.
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>> Yes. And it's funny because
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>> it lit up your face again.
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>> Yeah. It's it's funny because creatine
00:13:38
has been around for I mean ever for
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decades and it's always been in my mind
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it was like one of those gym bro things.
00:13:45
I'm like I don't need to be swole.
00:13:47
>> Yeah.
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>> I don't need creatine get get swole. And
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you know this is this was the thought
00:13:52
for for many many years. And then over
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the last five years or so,
00:13:59
the effects of creatine on the brain
00:14:01
started to really get my interest.
00:14:03
Anything that affects the brain, I
00:14:04
really become interested in. And so
00:14:07
that's kind of what did get me the most
00:14:09
excited about about creatine. But also,
00:14:13
I started doing a lot of resistance
00:14:14
training. And so I was like, "Okay, here
00:14:16
I am now. I'm like one of those gym
00:14:18
guys. I'm doing I'm doing the barbells.
00:14:21
I'm doing the, you know, the squats and
00:14:22
the deadlifts and all that and so, so
00:14:25
why not give myself some of the
00:14:26
creatine? Well, what is creatine, right?
00:14:29
Why is it important? You talked about
00:14:32
earlier, you know, why doesn't our body
00:14:35
just make more of these things that are
00:14:36
so beneficial? We do make creatine. We
00:14:39
make about, I don't know, our liver
00:14:41
makes about 1 to three grams a day of
00:14:43
creatine. And our brain also makes
00:14:46
creatine and those are the two organs
00:14:47
that make it. Creatine gets consumed by
00:14:52
other tissues like the muscle is
00:14:53
probably the one that's the greediest
00:14:55
because creatine is stored as
00:14:58
phosphocreatine but it's used to make
00:15:00
energy essentially. So it can increase
00:15:03
muscle mass, it can increase muscle
00:15:05
strength in combination with resistance
00:15:07
training because you're able to
00:15:09
regenerate and make energy faster. So,
00:15:13
for example, I became interested in it
00:15:15
after reading studies where people that
00:15:18
supplemented with creatine that were
00:15:20
engaged in resistance training were able
00:15:23
to gain more lean body mass. They were
00:15:25
able to gain more strength. It was
00:15:27
increasing their training volume. So,
00:15:29
you can do one to two more reps, right,
00:15:32
of of whatever exercise you're doing.
00:15:34
And it seems to decrease the recovery
00:15:36
time between those those sets as well.
00:15:39
So, you're able to increase your
00:15:40
training volume. Well, anything that's
00:15:42
going to in increase your training
00:15:43
volume is going to then have the
00:15:45
downstream effect of, you know,
00:15:47
increasing the adaptations like
00:15:48
increased muscle mass or increased
00:15:50
muscle strength. I started supplementing
00:15:53
with creatine about a year ago and I
00:15:56
started supplementing with it for that
00:15:57
reason, for the my training and I was
00:16:00
doing about five grams a day because
00:16:02
that was really what was shown to to be
00:16:04
beneficial for muscle health in
00:16:07
combination with resistance training.
00:16:08
And it's important for people to realize
00:16:10
that supplementing with creatine by
00:16:13
itself, without any type of resistance
00:16:15
training, isn't going to grow your
00:16:16
muscle. It's not going to make you
00:16:18
stronger. You have to put in the effort
00:16:20
because what creatine is doing, it's
00:16:23
helping you make the energy quicker,
00:16:25
right? And that and then being able to
00:16:28
make that energy quicker means that
00:16:29
you're able to then do that exercise
00:16:31
better, um, harder, more of it, right?
00:16:34
So, um, it's sort of sup supercharging
00:16:36
your exercise routine.
00:16:38
I had already been aware of the effects
00:16:40
on the brain. I thought maybe the five
00:16:42
grams a day would do that. So what are
00:16:44
the effects on the brain? Well, your
00:16:45
brain also consumes a lot of energy, you
00:16:48
know, needs a lot of energy. So it does
00:16:50
make its own creatine. But it turns out
00:16:53
if you can if you can give your brain
00:16:56
more of that creatine particularly under
00:16:59
a period of anything that's causing
00:17:01
stress. So let's say lack of sleep or
00:17:06
let's say emotional psychological stress
00:17:10
or in my case high cognitive load where
00:17:16
you're just every day learning concepts,
00:17:19
complex things. you're trying to
00:17:21
remember them. You're putting ideas
00:17:22
together and coming up with new
00:17:24
hypotheses and you know, you're just
00:17:26
you're just you're studying a lot and
00:17:28
it's very cognitively demanding and it's
00:17:31
it's a type of stress on your brain.
00:17:33
That's like my life, right? Um under
00:17:35
this condition of stress, depression is
00:17:38
another one that's a stress on your
00:17:39
brain or neurodeenerative disease,
00:17:42
that's a stress on your brain. So any
00:17:44
kind of stressful condition,
00:17:46
that's where creatine shines in the
00:17:49
brain. I would argue that um all of us
00:17:52
who who has the perfect amount of sleep
00:17:54
never has stress nobody, right? There's
00:17:56
always some sort of stress in the
00:17:58
background. So, um that's when I was
00:18:00
like, okay, so if you're the perfect
00:18:03
person, you have no stress, you get the
00:18:05
perfect amount of sleep every night,
00:18:07
your brain makes enough creatine to kind
00:18:09
of do what it needs to do. I know that
00:18:12
I'm constantly under stress. So, um I'm
00:18:15
like, okay, well, I think I need a
00:18:16
boost. And this is where a lot of very
00:18:18
interesting studies have come out of
00:18:20
many different labs. Um, some out of
00:18:22
Germany that looked at the dose of
00:18:24
creatine and how it increases creatine
00:18:27
levels in the brain. And this is why I
00:18:29
now supplement with 10 grams a day. So
00:18:32
the study out of Germany
00:18:34
found that five grams a day of creatine,
00:18:36
if you're supplementing with five grams
00:18:38
a day, your muscles are greedily
00:18:39
consuming it. Particularly if you're
00:18:41
working out, they want it. They want it.
00:18:43
after about five grams a day, especially
00:18:45
over a few months, like you're you're
00:18:47
saturating your muscle and that's
00:18:49
enough, right? Anything above that kind
00:18:52
of spills over to the brain. And so they
00:18:54
what this German study found was that 10
00:18:57
grams of creatine increased creatine
00:18:59
levels in several different regions of
00:19:01
the brain. And that was probably the
00:19:02
most exciting, you know, I would say
00:19:04
evidence that supplementing higher than
00:19:06
five grams a day was actually doing
00:19:08
something in terms of getting creatine
00:19:09
into the brain.
00:19:11
There have now been a variety of studies
00:19:13
that have looked at different outcomes,
00:19:15
right? So, if you supplement with 10
00:19:18
grams of creatine or even go higher than
00:19:20
that, like 20 grams of creatine, how
00:19:22
does that affect cognitive function,
00:19:23
right? And so, um some of these studies
00:19:26
have been been done by uh Dr. Darren
00:19:28
Kandow. He's um at the University of
00:19:30
Regina in Canada and it's looked they've
00:19:33
looked at things like sleep deprivation
00:19:36
and it's been found that if you take
00:19:38
someone and you sleep deprive them for
00:19:41
21 hours and give them about 25 to 30
00:19:45
grams of creatine, it completely negates
00:19:49
the cognitive deficits of sleep
00:19:51
deprivation. Actually, not only does it
00:19:54
negate the cognitive deficits of sleep
00:19:56
deprivation, it makes people function
00:19:59
better than if they were well-rested.
00:20:03
That's where I was like, wait a minute,
00:20:06
there's many times when I'm traveling,
00:20:07
I'm jet-lagged. Uh lots of times when
00:20:10
I'm sleepd deprived and I have to be
00:20:11
doing a podcast or a presentation,
00:20:13
whatever. And in those situations, I go
00:20:17
up from my 10 grams to more like 20
00:20:20
grams. Today, for example, I wasn't
00:20:23
really sleepdeprived, but you know,
00:20:26
there's a lot of high cognitive demand.
00:20:28
This is a long podcast. There's all that
00:20:30
stuff. And so, I went up to 20 grams
00:20:32
today on my creatine. And I well, I will
00:20:35
say even at the 10 gram for me, we were
00:20:38
talking about this with respect to being
00:20:40
in ketosis.
00:20:42
I don't feel that mid-after afternoon
00:20:44
crash when I have the creatine, not
00:20:47
being on a ketogenic diet, not being in
00:20:48
ketosis. It's very clear for me and I've
00:20:51
done this where sometimes I only do five
00:20:53
grams and then if I do that I'll notice
00:20:56
I'm like why am I tired right now? So
00:20:58
there's something interesting and maybe
00:20:59
it's placebo. I'm going to throw that
00:21:02
out there. Very possible. But I don't
00:21:04
know maybe the creatine is again it's
00:21:06
able to regenerate that energy quicker
00:21:09
and so that's also beneficial for the
00:21:10
brain. And now I I would say all these
00:21:13
creatine researchers a lot of them are
00:21:15
shifting to the brain. It used to be all
00:21:16
muscle focused and now people are super
00:21:19
interested in what creatine is doing to
00:21:22
the brain, especially if you're
00:21:23
supplementing with more of it. And you
00:21:26
know, this is important for people that
00:21:27
are under a stressful situation, but
00:21:30
also for vegans because creatine is
00:21:32
found in food, mostly in animal products
00:21:35
like meat and poultry and fish, dairy. A
00:21:37
lot of vegans don't eat that. And I've
00:21:39
had so many of my vegan friends,
00:21:42
I've got them on the creatine, and it's
00:21:44
changed their lives. I mean, they're
00:21:46
like, "This is like incredible." You
00:21:48
know, can you imagine someone who's not
00:21:49
getting any creatine from their diet cuz
00:21:51
they eat no meat and all of a sudden
00:21:53
they start supplementing with 5 10 grams
00:21:55
of creatine and it's like they have
00:21:57
energy. Some people say they they
00:21:59
require less sleep, which is kind of
00:22:01
interesting. That's kind of a comment
00:22:03
I've heard many many times from people
00:22:04
is that it's like their brain doesn't
00:22:06
need as much sleep. They have more
00:22:08
energy. So, um, I've been a big fan of
00:22:11
the creatine, um, not only for the
00:22:13
muscle especially because, you know,
00:22:14
working out is something that's very
00:22:16
important, but for the brain as well.
00:22:19
I always thought of creatine as
00:22:21
something that you you took and you kind
00:22:22
of had to load up on and then over a
00:22:24
couple of weeks or months, the effects
00:22:25
would kick in. But you're telling me
00:22:27
that if I had creatine in the morning,
00:22:29
that same day, I would experience
00:22:31
potentially improved cognition if I have
00:22:34
a big enough dose.
00:22:35
>> Yes. So, um, great question. A lot of
00:22:38
studies that have been done that you're
00:22:40
referring to have been done in the
00:22:42
context of exercise and muscular
00:22:45
performance. And the reason why people
00:22:49
have to load up on like they do a
00:22:51
loading phase, let's say 20 grams and
00:22:53
then they go down to this sort of
00:22:54
maintenance phase of 5 g is because it
00:22:58
takes I don't know, I think it's about a
00:23:00
month or so before you can saturate your
00:23:03
muscular stores of creatine. And then
00:23:06
>> what does that mean? It means that um
00:23:08
the creatine which is actually stored in
00:23:10
your muscle as phosphocreatine is there
00:23:12
and ready to be used to make energy. So
00:23:16
so it takes again it takes about a month
00:23:20
or so to do that unless you are really
00:23:22
giving your muscles a high dose, right?
00:23:24
So the five grams a day it only it can
00:23:26
only do it for so many days and then
00:23:29
finally you get saturated. When you do
00:23:30
this loading phase you kind of just
00:23:32
accelerate that whole process. And so
00:23:34
that's why when people are doing these
00:23:36
experiments where they want to test the
00:23:37
effects of creatine, they want they want
00:23:39
the participants to have really high
00:23:41
levels of creatine in their muscles
00:23:42
quick because they don't want to do a
00:23:44
month-long experiment, right? They want
00:23:45
the experiment to be like a couple of
00:23:47
weeks or a week. So that was kind of the
00:23:49
whole concept behind this loading phase.
00:23:51
If you're not someone who's going to
00:23:54
some kind of competition, you know, like
00:23:56
your CrossFit games or something, you
00:23:58
don't really need to do that loading
00:23:59
phase if you've already been
00:24:00
supplementing with five grams a day for
00:24:02
like a month. When it comes to the
00:24:04
brain, what's happening if you get above
00:24:07
that 5 g, that's pretty much all
00:24:09
consumed by the muscle. You're having
00:24:12
some leftover in circulation and the
00:24:14
brain takes it up and it takes it up,
00:24:16
right? When it re what it really shines
00:24:19
is under that stressful condition, which
00:24:21
again for me, I feel like every day is
00:24:23
this is is like cognitively demanding
00:24:26
for me because I'm constantly, you know,
00:24:28
learning new material or learning new
00:24:30
information or working on things, right?
00:24:31
And so there's a lot of cognitive stress
00:24:33
on my brain. And so I feel like I'm
00:24:35
constantly under that stress. And that's
00:24:37
where getting the creatine in your brain
00:24:39
helps you make that energy quicker. And
00:24:41
so that's why like I've done I've had,
00:24:43
you know, been jetlagged and have have
00:24:45
to give a talk at you, you know, like
00:24:47
5:00 a.m. in the morning, my my
00:24:48
biological time after not getting sleep.
00:24:50
And I've done like 25 grams of creatine.
00:24:53
And it it's insane how much it helps me.
00:24:56
Again, it could be placebo because I'm
00:24:57
anticipating that effect, which is fine.
00:24:59
Placebo is a real thing. It's great. I'm
00:25:01
all about it. But there's some evidence
00:25:04
also that this works, right? That the
00:25:07
creatine is helping with under that
00:25:08
sleep deprivation and that stressful
00:25:10
condition.
00:25:11
>> I was reading about a study in 2025
00:25:13
where they
00:25:15
gave creatine to people that had
00:25:17
depressive symptoms alongside CBT
00:25:19
training. And the people that had
00:25:21
creatine and the cognitive behavioral
00:25:23
therapy training experienced a greater
00:25:25
improvement in their depression symptoms
00:25:27
than those who just received the
00:25:29
cognitive behavioral therapy, which is
00:25:32
which is incredible.
00:25:34
>> It's fascinating. I mean, depression is
00:25:36
a type of brain stress, right? I mean,
00:25:38
we know inflammation plays a role in in
00:25:41
depression. We know oxidative stress
00:25:43
plays a role in depression. And there
00:25:46
have now been some animal studies that
00:25:48
have shown creatine is somehow having an
00:25:50
anti-inflammatory effect. I that hasn't
00:25:52
all been worked out. So I don't know if
00:25:54
it's all just the energy component of
00:25:57
it. It could also be this other sort of
00:25:59
newly identified role that creatine is
00:26:02
playing in sort of having an
00:26:04
anti-inflammatory effect. And I don't
00:26:06
know much enough about that. I don't
00:26:07
know that there's enough even known
00:26:09
about that. But I do know that it
00:26:10
exists. And it's fascinating because
00:26:12
again I think where creatine really
00:26:15
shines in the brain and it's been shown
00:26:17
study after study is under some kind of
00:26:19
stressful condition depression or sleep
00:26:21
deprivation or there's a new study that
00:26:24
came out it was published I don't know a
00:26:26
month ago or so showing that it was a
00:26:29
very small pilot study and I want to
00:26:30
caveat this there was no placebo control
00:26:34
but it did show that giving people with
00:26:37
Alzheimer's disease creatine I believe
00:26:39
it was 20 grams a day did improve their
00:26:42
cognition. And so again, this is a whole
00:26:45
new field where now we're looking at
00:26:47
creatine in the brain, not just the gym
00:26:50
bro Bros and not just the muscular
00:26:51
effects, but in the brain and how it's
00:26:54
affecting the brain and being beneficial
00:26:56
for cognition, for brain aging, for
00:27:00
depression.
00:27:01
>> Here's the fourth most replayed moment.
00:27:04
One of the most inspiring and I think
00:27:06
liberating things that I've heard in
00:27:07
your work is this idea of
00:27:09
neuroplasticity. Because if you're if
00:27:12
the brain can physiologically change
00:27:14
based on what I'm doing, then it means
00:27:16
that who I am now, my identity, that 16
00:27:18
that 19-year-old who's sleeping in the
00:27:19
mummy thing with the ferret isn't who I
00:27:21
always have to be. I can literally
00:27:23
change. Um, we've spoken a little bit
00:27:26
around like what causes the motivation
00:27:28
to actually change, but knowing that
00:27:29
there's a my brain will actually change.
00:27:31
Those two things are really inspiring
00:27:34
for me because it means that whatever
00:27:35
rut I'm stuck in isn't necessarily a
00:27:37
permanent one. Now, you said that the
00:27:39
motivation to change comes from fear.
00:27:41
>> Well, in my case, it took a a fear
00:27:44
circumstance, fear of becoming a
00:27:47
permanent failure.
00:27:48
>> Yeah.
00:27:48
>> To motivate immense change. And um uh
00:27:52
that was that circumstance. I I do
00:27:54
believe however that the best work, our
00:27:57
most creative and best work comes from a
00:28:00
love of craft. But sometimes in order to
00:28:03
find what you truly love, you have to be
00:28:06
scared into setting off on a path to
00:28:08
find it. So neuroplasticity
00:28:11
is absolutely real. But if the question
00:28:14
is can a person change, can you learn
00:28:17
new things? Can you unlearn certain
00:28:19
patterns? Can you overcome traumas at
00:28:22
any age? The answer is absolutely
00:28:25
categorically yes. How? Well, it's very
00:28:29
clear that as a child until about age
00:28:32
25, more or less just passive experience
00:28:35
will shape the brain for better or
00:28:37
worse. After about age 25, and again
00:28:40
these are not strict cut offs,
00:28:43
we can change our brain. But what's
00:28:45
required is a marketked shift in the
00:28:47
neurochemical environment under which
00:28:50
something happens. So one of the reasons
00:28:52
why any traumatic event will forever be
00:28:55
remembered although by the way you can
00:28:57
remove some of the emotional load of
00:28:58
that trauma does not have to be
00:29:00
traumatic forever
00:29:02
is because when we see or experience
00:29:05
something very intense of a fearful
00:29:07
nature there is the release of certain
00:29:10
what we call neurom modulators things
00:29:12
like epinephrine adrenaline and other
00:29:15
neurom modulators that cause a state
00:29:18
shift in our broad body and brain And
00:29:21
the nervous system recognizes this as
00:29:23
unusual and as a consequence in the
00:29:25
subsequent days there's reordering of
00:29:27
the connections so that the brain can
00:29:30
prepare for that event should it happen
00:29:32
again. This is why we have what's called
00:29:34
one trial learning. You go to a certain
00:29:36
location, something terrible happens
00:29:38
there, you will forever associate that
00:29:40
location with something terrible. But
00:29:42
there are tools, therapy and other tools
00:29:45
that can allow the emotional load to be
00:29:48
removed from that so that you could go
00:29:49
to that location and feel calm, no fear
00:29:52
whatsoever. The good news is you can
00:29:54
also learn anything you want to learn
00:29:56
provided there's a shift in this
00:29:58
neurochemical environment. This is why
00:30:00
when we are very interested and focused
00:30:02
on something, two of the main
00:30:04
requirements for neuroplasticity, we
00:30:06
have to be alert and we have to be
00:30:07
focused. We can't learn passively as
00:30:09
adults. We can't just play um you know a
00:30:13
a lecture about AI and large language
00:30:16
models or neuroscience in the room and
00:30:18
then it just the knowledge doesn't just
00:30:20
sink in by osmosis.
00:30:22
But if we pay attention and we're alert
00:30:24
when we pay attention
00:30:26
there's a shift in the neurochemicals
00:30:28
associated with that attention. What we
00:30:30
call the catacolamines. It's three
00:30:32
molecules dopamine, epinephrine and
00:30:34
norepinephrine. All which cause an
00:30:36
increase in alertness. all which cause
00:30:38
an increase in focus, a tightening of
00:30:40
our visual field and our auditory field.
00:30:42
So like cones of attention is one way to
00:30:44
think about it. And then it sets in
00:30:46
motion a bunch of biological processes
00:30:48
such that if we get adequate sleep that
00:30:50
night, maybe the next night as well,
00:30:53
there's reordering of neural connection
00:30:54
so that that knowledge, that new
00:30:56
experience is consolidated in your
00:30:59
brain. You are forever changed as a
00:31:01
consequence of that experience. So when
00:31:04
we hear that the brain is constantly
00:31:06
changing, everything that we encounter
00:31:08
changes our brain, that's not true. Why
00:31:11
would the brain change unless it needed
00:31:12
to, right? As a child, the brain is
00:31:14
basically a template for change. It's
00:31:16
it's trying to understand the
00:31:17
environment and make predictions. And so
00:31:19
that's true. Neuroplasticity is is a
00:31:23
cardinal feature of of childhood and
00:31:25
adolescence and the teen years. Just
00:31:27
think about the music you listen to when
00:31:28
you were a teen. No other music will
00:31:30
ever have as much significance. And
00:31:32
that's because as a teen your body is
00:31:33
flooded with hormones and neurom
00:31:35
modulators that the amount of meaning
00:31:37
that comes from now seemingly trivial
00:31:40
events when you're a teenager or
00:31:41
adolescent is immense. That song meant
00:31:44
so much and it's because of the
00:31:45
neurochemical meu it creates in you. But
00:31:48
as an adult it takes a stronger stimulus
00:31:50
as we say. The nervous system is very um
00:31:53
efficient in that way. It doesn't change
00:31:56
unless it has to and it always changes
00:31:59
if it needs to in order to keep you
00:32:01
safe. This is why there's an asymmetric
00:32:03
influence of fear as opposed to um just
00:32:06
interest in terms of what will shift our
00:32:08
brain. But it's nice to know that love
00:32:13
and excitement and appreciation are very
00:32:16
strong stimula for changing the brain.
00:32:19
From everything we know about
00:32:20
neuroscience, it's clear that doesn't
00:32:23
matter if you're 90 years old, 70 years
00:32:26
old, 50 years old, if you want to learn,
00:32:28
you can learn. And that learning occurs
00:32:30
through neuroplasticity, which is the
00:32:32
reordering of neural connections,
00:32:34
strengthening of certain connections,
00:32:35
weakening of others, and in some rare
00:32:37
cases, the addition of new neurons. But
00:32:40
you absolutely can change your brain,
00:32:41
but you have to pay attention to the
00:32:44
thing you want to incorporate into your
00:32:46
brain. You have to be alert while you do
00:32:48
that. And then you absolutely have to go
00:32:50
get some rest because it's during sleep
00:32:52
and during meditative states and during
00:32:55
rest that the actual rewiring of the
00:32:57
brain occurs.
00:32:59
>> You know, every once in a while you come
00:33:00
across a product that has such a huge
00:33:02
impact on your life that you'd probably
00:33:04
describe as a gamecher. And I would say
00:33:09
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00:33:12
would currently describe this product
00:33:14
that I have in front of me called Ketone
00:33:16
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00:33:19
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00:33:21
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00:33:22
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00:33:23
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00:33:26
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00:33:27
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00:33:29
idea what it was. Lily in my team says
00:33:31
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00:33:33
I went upstairs, tried it, and quite
00:33:35
frankly, the rest is history. in terms
00:33:37
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00:33:40
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00:33:44
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00:33:53
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00:34:00
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faster than typing. So, if you want to
00:34:48
give it a try, head over to
00:34:49
whisperflow.ai/doac
00:34:52
to get started for free. And you can
00:34:54
find that link to Whisper Flow in the
00:34:56
description below. There are a few
00:34:58
sports that I make time for, no matter
00:35:00
where I am in the world. And one of them
00:35:02
is, of course, football. The other is
00:35:03
MMA, but watching that abroad usually
00:35:05
requires a VPN. I spend so much time
00:35:08
traveling. I've just spent the last 2
00:35:10
and 1/2 months traveling through Asia
00:35:12
and Europe and now back here in the
00:35:13
United States. And as I'm traveling,
00:35:15
there are so many different shows that I
00:35:16
want to watch on TV or on some streaming
00:35:18
websites. So when I was traveling
00:35:19
through Asia and I was in Koala Lumpur
00:35:21
one day, then the next day I was in Hong
00:35:22
Kong and the next day I was in
00:35:23
Indonesia, all of those countries had a
00:35:25
different streaming provider, a
00:35:26
different broadcaster. And so in most of
00:35:29
those countries I had to rely on
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ExpressVPN who are sponsor of this
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podcast. Their tool is private and
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secure and it's very very simple how it
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00:35:58
Here is the third most replayed moment.
00:36:00
For those people who have just clicked
00:36:01
to listen to this conversation, can you
00:36:04
tell them the mission you're on and why
00:36:07
it's so important?
00:36:09
>> Yeah. Well, thanks so much for having
00:36:10
this conversation with me. I think that
00:36:12
illustrates the problem, right? someone
00:36:14
as informed as you don't know anything
00:36:15
or never heard of nitric oxide. So,
00:36:17
>> it's important for us to just make a
00:36:18
distinction between um like nitric gas
00:36:22
that people, you know, inhale and that
00:36:25
used if you played like uh some of those
00:36:27
racing car games, you press a button and
00:36:28
the car goes really fast. If you
00:36:29
>> That's nitrous nitrous.
00:36:32
>> These are two separate things.
00:36:33
>> No, very Yeah, very good point. So, this
00:36:34
is not nitrous oxide. Nitrous oxide is I
00:36:39
mean a medicine is a dental anesthetic,
00:36:41
right? It's a gas. It's called laughing
00:36:42
gas. That's N2O. That's the chemical
00:36:45
formula. What we're talking about is
00:36:47
nitric oxide or NO. One nitrogen, one
00:36:50
oxygen. This molecule is is foundational
00:36:53
for human health and longevity. So
00:36:56
nitric oxide is a gas. It's a naturally
00:36:57
produced molecule. It's a signaling
00:36:59
molecule in the human body. And so it's
00:37:01
it regulates things like blood flow and
00:37:04
oxygen delivery. And it mobilizes our
00:37:05
own stem cells to help us recover and
00:37:07
repair and replace dysfunctional cells.
00:37:10
it uh improves energy production inside
00:37:12
the cell and it regulates blood flow. So
00:37:15
nitric oxide is a gas. It's produced in
00:37:17
the endthelium. So the endothelium is
00:37:18
the single layer of cells that line
00:37:20
every blood vessel throughout the body.
00:37:23
So the function of these endothelial
00:37:25
cells is to regulate vascular tone and
00:37:28
to regulate you know solute exchange and
00:37:31
extravisation or transport of molecules
00:37:34
across that endothelial layer. And so
00:37:36
when your endthelial cells can no longer
00:37:38
make nitric oxide gas, they no longer
00:37:40
dilate. So the blood vessels become
00:37:43
constricted. You start to get
00:37:45
inflammation. You get stiff arteries,
00:37:47
plaque deposition, and that's what
00:37:49
starts cardiovascular disease
00:37:51
orthoscerosis.
00:37:52
>> So let me get this straight. I'll repeat
00:37:54
back to you what I think I understand
00:37:55
about nitric oxide. And you tell me if
00:37:57
it's accurate. So this nitric oxide is a
00:38:00
chemical that is in all the blood cells
00:38:03
of my body and it allows my blood cells
00:38:06
to basically expand open up so blood can
00:38:09
flow through there. So if I
00:38:11
>> it dilates it dilates the smooth muscle.
00:38:14
So it's not affecting
00:38:15
>> the cells per se but it's dilating the
00:38:17
smooth muscle that surrounds the blood
00:38:19
vessels which leads to re relaxation and
00:38:21
dilation.
00:38:22
>> Fine. So my blood cells would then
00:38:23
expand
00:38:24
>> your blood vessels
00:38:24
>> and more blood would go through there.
00:38:26
But if I'm deficient, that mechanism
00:38:28
doesn't work and my blood cells wouldn't
00:38:31
expand ultimately expand through the
00:38:33
relaxation of the muscles.
00:38:34
>> That's right.
00:38:35
>> And therefore, I would have higher blood
00:38:37
pressure, which can lead to a series of
00:38:40
downstream diseases and consequences.
00:38:42
And so when we look at the graph that I
00:38:44
showed a second ago where we're seeing
00:38:46
for anyone that can't see this graph
00:38:47
because you're listening on audio, we're
00:38:49
seeing
00:38:52
nitric oxide levels in young people up
00:38:54
to the age of roughly around 20 are
00:38:57
optimal. And then from about 30 to 70,
00:39:00
there's this tremendous sort of 80 90%
00:39:02
drop. in terms of chronic disease that
00:39:05
is downstream from me losing nitric
00:39:07
oxide level. Can you give me a bit of a
00:39:09
menu of chronic disease that is
00:39:11
associated with this nitric oxide
00:39:14
deficiency?
00:39:15
>> Yep.
00:39:17
We've touched on them. So erectile
00:39:18
dysfunction. So in erections in both men
00:39:21
and women are dependent upon dilation of
00:39:23
the blood vessels to get engorgment to
00:39:25
get increase in blood flow. And that's
00:39:27
what an erection is. And we call that
00:39:29
the canary in the coal mine because for
00:39:31
years people thought it was a lifestyle
00:39:33
disorder. Right.
00:39:34
>> Well, erectile dysfunction.
00:39:36
>> Yeah. But now it's recognized that it's
00:39:37
a symptom of loss of nitric oxide and
00:39:41
really an accelerated form of
00:39:42
cardiovascular disease,
00:39:44
>> high blood pressure, metabolic disease,
00:39:46
and diabetes. And then the other one is
00:39:48
uh obviously Alzheimer's because
00:39:50
Alzheimer's is a vascular disease. And
00:39:52
nitric oxide corrects every single thing
00:39:54
we know about Alzheimer's. It improves
00:39:57
blood flow to the brain. It improves
00:39:59
glucose uptake. So, it overcomes the
00:40:01
metabolic aspect of Alzheimer's. It
00:40:03
reduces inflammation. In fact, a number
00:40:05
of my patents on a method of reducing
00:40:07
inflammation. It inhibits the oxidative
00:40:10
stress we see in in Alzheimer's and
00:40:11
neurological disease. And it prevents
00:40:13
the immune dysfunction. And when you do
00:40:15
that, when you restore blood flow and
00:40:17
you get nutrients and oxygen in and you
00:40:19
take out the metabolic waste products,
00:40:20
there's no misfolding of protein. So,
00:40:22
you don't get the amaloid plaque, you
00:40:24
don't get the tangles. So this simple
00:40:26
molecule nitric oxide gas I'm absolutely
00:40:30
convinced will eradicate and cure
00:40:32
Alzheimer's
00:40:33
>> really
00:40:33
>> because it it addresses every
00:40:35
physiological root cause of Alzheimer's
00:40:38
>> if you can get it administered
00:40:39
therapeutically to patients early enough
00:40:43
or
00:40:44
>> no I think that's a very key because the
00:40:46
success or failure of any clinical trial
00:40:49
any drug in any clinical trial is
00:40:51
dependent upon the design of the
00:40:52
clinical trial and what patients at what
00:40:54
stage of disease that you enroll these
00:40:56
patients. So what are the inclusion
00:40:58
criteria and what are the exclusion
00:40:59
criteria
00:41:01
and there's a stage in every disease
00:41:04
whether it's heart disease, kidney
00:41:06
disease, Alzheimer's where you've
00:41:08
reached a point of no return. There's
00:41:10
really no medical therapy that's going
00:41:11
to reverse that disease because it's
00:41:13
progressed to a state that's
00:41:14
irreversible. So I think what we try to
00:41:17
do is take
00:41:19
take patients early in the process what
00:41:21
we call vascular dementia mild cognitive
00:41:23
impairment early Alzheimer's because
00:41:25
what I want to be able to demonstrate is
00:41:27
two things number one can we stop the
00:41:30
progression of disease once it's started
00:41:33
can we stop the progression and then
00:41:35
number two is we want to enroll patients
00:41:38
far enough along to where we can show
00:41:41
regression so can you move can you move
00:41:43
the needle back and so That's a very
00:41:46
kind of a specific and finite patient
00:41:48
population. When you design a clinical
00:41:51
study, number one, at the at the
00:41:53
absolute worst, we want to stop
00:41:54
progression. At the absolute best, we
00:41:56
want to show that we can regress
00:41:58
disease. And that's the goal of therapy
00:42:01
is that you understand the mechanism of
00:42:02
disease to the extent that you can treat
00:42:05
it, you can prevent it, you can reverse
00:42:07
it, and you can cure it. When I think
00:42:09
about the role that food plays in my
00:42:11
nitric oxide production, what should I
00:42:15
be eating to increase um my nitric oxide
00:42:19
levels or to keep them at a healthy
00:42:20
level?
00:42:22
>> I think it the same answer is for that
00:42:25
too. It's it's not so much what we
00:42:27
should be eating, it's what we should
00:42:28
not be eating.
00:42:29
>> Okay,
00:42:30
>> so we we'll we'll cover those step by
00:42:32
step. Number one, you have to avoid
00:42:33
sugar and high glycemic index foods
00:42:38
because sugar is a toxin. It's a poison.
00:42:40
And let's think about what sugar is. So
00:42:43
when we eat sugar or drink sugar
00:42:46
beverages, right? Whether it's sucrose,
00:42:48
whether it's fructose, whether it's high
00:42:50
fructose corn syrup, the end result
00:42:52
inside the human is we see an increase
00:42:54
in glucose. So elevation in blood sugar
00:42:58
or blood glucose is diabetes, right? And
00:43:02
now there's continuous glucose monitors
00:43:04
that you can get anywhere and everybody
00:43:06
does this. So if you eat something and
00:43:08
it causes an increase in your blood
00:43:10
sugar, blood glucose, then you should
00:43:12
avoid that because glucose as the name
00:43:14
implies is glue, right? It's sticky. And
00:43:17
if we if you have a soda and you spill
00:43:19
it on your countertop, you come back the
00:43:21
next day, it's sticky, right? Well,
00:43:23
that's what happens inside the body.
00:43:25
That sugar sticks to everything. It
00:43:26
sticks to proteins. It sticks to
00:43:28
enzymes.
00:43:29
>> And it lowers nitric oxide production.
00:43:31
>> Absolutely. That's why diabetics have a
00:43:34
10 times higher incidence of heart
00:43:36
attack, stroke, all cause mortality
00:43:37
mortality. That's why they develop neur
00:43:40
neurological or peripheral neuropathy.
00:43:42
That's why they have non-healing wounds.
00:43:44
There's no nitric oxide. That's why
00:43:46
they're developing diabetic retinopathy,
00:43:48
macular degeneration, pancreatitis. I
00:43:51
mean, all of that can be traced back to
00:43:53
a lack of nitric oxide production
00:43:55
because the sugar is stuck to the
00:43:57
enzyme. The sugar destroys the oral
00:43:59
microbiome and completely changes the
00:44:02
the ecology of the bacteria and
00:44:04
completely shuts down nitric oxide
00:44:05
production. Right? But I think to answer
00:44:08
your question, what should we be eating?
00:44:10
I think you've got to eat a balanced
00:44:12
diet in moderation. You know, Americans
00:44:14
are overfed. All you got to do is walk
00:44:15
around and see the the epidemic of
00:44:18
obesity. good high quality protein, good
00:44:21
quality fats, and little or no carbs.
00:44:24
And it's really that simple.
00:44:27
>> Here's the second most replayed moment.
00:44:29
When you think about behaviors and
00:44:31
habits that are popular and trendy at
00:44:33
the moment, are there any that stand out
00:44:35
to you as being particularly good for
00:44:37
the brain or particularly bad for the
00:44:39
brain? Cuz I had a couple come to mind
00:44:42
that I wanted to throw at you. I mean,
00:44:43
one of them that's exploding in the UK
00:44:45
at the moment is paddle, which is kind
00:44:49
of I think you call it pickle ball here.
00:44:52
Good for my brain, bad for my brain.
00:44:54
It's so good for your brain because
00:44:58
it's working your cerebellum. And I told
00:45:02
you that because yours was sleepy
00:45:05
and as you activate this and you do that
00:45:08
with coordination exercises, it then
00:45:10
activates your frontal loes. Does that
00:45:12
mean that people that are uncoordinated
00:45:14
have a cerebellum issue?
00:45:16
>> Yes.
00:45:16
>> Oh, really?
00:45:19
>> Okay.
00:45:19
>> And the more you do it, the better
00:45:21
coordination you develop.
00:45:25
>> And that's why coordination exercises
00:45:28
for kids. So, we talked about kids is
00:45:32
you want to do that with them early.
00:45:35
Play sports, but not sports where
00:45:37
they're going to get a head injury,
00:45:39
right? I mean, we have to be smarter
00:45:41
than we are. Um, but when I was young,
00:45:46
my mother, who's now 93, was the
00:45:52
pingpong champion in the neighborhood,
00:45:55
and she was really good, and she never
00:45:57
let us beat her until we could
00:46:00
>> and but she was always encouraging.
00:46:05
I've got um I was looking then as you
00:46:08
were speaking about different trends at
00:46:10
the moment that are either good or bad
00:46:11
for the brain and one big trend at the
00:46:13
moment is neuroplasticity training. Lots
00:46:16
of people are doing games and using
00:46:18
other things to like there's apps you
00:46:20
can get that are neuroplasticity
00:46:22
training apps. Does any of that stuff
00:46:23
work?
00:46:24
>> Some of it
00:46:25
>> some of it works. And if you're so for
00:46:28
example, if you're doing memorization
00:46:30
games, do them while you're on the bike.
00:46:36
Now, not in the street, but if you're on
00:46:38
a stationary bike and
00:46:41
you're doing those games, it's been
00:46:45
found that exercise
00:46:48
increases blood flow to the hippocampus,
00:46:53
meaning you're more likely to remember
00:46:55
it and you're strengthening your brain
00:46:58
in the process. So, exercise with new
00:47:01
learning,
00:47:03
stunning. So if I want to learn
00:47:05
something, I should do it while walking
00:47:08
or moving in motion,
00:47:10
>> right? So if you're listening to a
00:47:12
language app, for example, do it while
00:47:14
you're walking.
00:47:15
>> Mindfulness and meditation, good or bad
00:47:17
for the brain.
00:47:18
>> Great. I published three studies on a
00:47:21
condundolini yoga form of meditation
00:47:23
called kin crea. It's a 12minute
00:47:27
meditation. I always say it's the
00:47:28
perfect ADD meditation because it's only
00:47:30
12 minutes. And for 12 minutes you do
00:47:33
this. Sa
00:47:35
m saw
00:47:37
saw.
00:47:39
It's two minutes out loud, two minutes
00:47:41
whispering, four minutes silently to
00:47:44
yourself.
00:47:46
2 minutes whispering, 2 minutes out
00:47:47
loud, you're done. Satan ma, birth,
00:47:51
life, death, reborn. Birth, life, death,
00:47:54
reborn. But the one we studied is sat na
00:47:59
ma. And so if they look it up, kitin
00:48:03
crea um activates your cerebellum,
00:48:08
activates your frontal loes, calms down
00:48:11
your emotional brain. People who did
00:48:15
that for 12 minutes for 8 weeks, their
00:48:20
resting frontal lobe function was
00:48:22
stronger.
00:48:25
So simple.
00:48:27
>> What the hell is going on there?
00:48:29
I think it's the focused attention plus
00:48:33
you're doing a coordination meditation s
00:48:36
no s
00:48:40
>> loving your job good or bad for the
00:48:42
brain
00:48:43
>> absolutely great for your brain if
00:48:48
you're learning new things people who
00:48:50
are in a job that does not require new
00:48:54
learning have a higher incidence of
00:48:56
Alzheimer's disease So if you're
00:48:58
stagnant in your work, you have a higher
00:49:00
risk of
00:49:01
>> Alzheimer's. And like if I just read
00:49:03
brain scans all day, well, I know how to
00:49:06
do it. I'm not learning anything new.
00:49:10
So I do that,
00:49:13
but I also am writing about something I
00:49:16
don't know about. Um, or I'm learning
00:49:20
something new.
00:49:22
>> What if you're working with
00:49:24
>> I'm sorry.
00:49:24
>> I love the job, but I'm working with
00:49:26
>> Bad for your brain. Chronic stress
00:49:30
increases cortisol. And I think
00:49:33
everybody should sort of know their
00:49:34
baseline cortisol level
00:49:38
and cortisol shrinks the hippocampus
00:49:42
and puts fat on your belly. So that's
00:49:45
two very bad things for your brain.
00:49:48
>> Breath work. That's a big trap.
00:49:49
>> Excellent. Excellent. You want to break
00:49:51
a panic attack?
00:49:53
The 15-second breath. 4 seconds in, hold
00:49:58
it for a second and a half. Eight
00:50:00
seconds out, hold it for a second and a
00:50:04
half. You just do that four or five
00:50:07
times, your whole nervous system will
00:50:11
calm down. And the research shows take
00:50:14
twice as long to breathe out as you
00:50:18
breathe in. That's why 4 seconds in, 8
00:50:21
seconds out.
00:50:22
>> It shifts your nervous system, doesn't
00:50:24
it?
00:50:24
>> Yes. It increases something called
00:50:26
veagal tone.
00:50:27
>> Okay. Some bad things then. Social media
00:50:29
usage. Chronic social media usage. Good
00:50:31
for the brain, bad for the brain.
00:50:33
>> Because you're constantly comparing
00:50:35
yourself to people who aren't real.
00:50:38
>> What about workcoholism and hustle
00:50:40
culture?
00:50:41
>> So,
00:50:44
I love my work.
00:50:47
Am I addicted to it? I don't know. But I
00:50:50
love it.
00:50:55
When they say people are workaholics and
00:50:57
it's bad for the brain, it's they're
00:51:01
working
00:51:02
with
00:51:05
or doing something they don't like or
00:51:08
doing it for the money but without
00:51:12
other purpose.
00:51:14
>> Microplastics, that's a big
00:51:15
>> awful for the brain. One of the major
00:51:18
causes of hormone disruption and cancer.
00:51:24
and other environment.
00:51:25
>> Thank you for not giving me a plastic
00:51:26
water bottle. Yeah,
00:51:27
>> it's okay. Imagine imagine if we did
00:51:30
that when we spend a long a lot of time
00:51:31
these days talking about the
00:51:33
microplastics and other environmental
00:51:34
toxins that I think people are becoming
00:51:36
more aware of now which is good noise
00:51:39
pollution
00:51:40
bad for the brain and if if it hurts
00:51:44
your hearing hearing loss is actually
00:51:47
one of the risk factors for Alzheimer's.
00:51:50
Why is that? I did a I did a
00:51:52
>> Because you're not getting input, right?
00:51:54
>> And if you're not getting appropriate
00:51:56
input,
00:51:58
your brain starts to atrophy.
00:52:02
And if you don't hear what other people
00:52:06
are saying and you have a lot of ants,
00:52:09
you have a high negativity bias is you
00:52:12
can actually begin to get a bit paranoid
00:52:15
and fill in the empty spaces with
00:52:18
negativity.
00:52:19
I just bought some new Apple AirPods and
00:52:22
when I connected them to my phone, it
00:52:24
said, "You want to do a hearing test?"
00:52:25
So, I did the hearing test and then I
00:52:27
asked my girlfriend, I said, "You should
00:52:28
do this hearing test as well." Cuz I
00:52:29
needed something to compare it to. And I
00:52:31
was a little bit shocked. Um, it said I
00:52:34
hadn't lost any hearing yet, but my
00:52:36
hearing was significantly not as good as
00:52:38
hers. And I remember thinking, gosh,
00:52:42
you know, this is, but I didn't have any
00:52:43
idea that it was linked to Alzheimer's
00:52:45
at all. So now I've turned down the
00:52:47
volume for the first time in my life
00:52:49
because I think your hearing declines
00:52:51
regardless really of what you do with
00:52:53
age anyway. Um but as you said earlier
00:52:55
like starting from a better baseline
00:52:56
when you're talking about the brain
00:52:58
reserves is really the game I think with
00:53:01
aging. My last point is uh my last
00:53:05
question is a bit of a
00:53:07
seems to be uncorrelated but the world
00:53:09
is heading towards a world that's driven
00:53:11
by artificial intelligence. It's like
00:53:14
all the all the rage at the moment if
00:53:15
you log on the internet. People talking
00:53:17
about they're going to lose their jobs.
00:53:19
All of these new tools that allow us to
00:53:21
optimize our lives in a variety of
00:53:22
different ways. When you think about the
00:53:24
world of AI that we're heading into,
00:53:26
there's so many ways that I imagine it's
00:53:28
going to make your job easier as someone
00:53:30
who's doing scans of brains and so on.
00:53:34
But do you think artificial intelligence
00:53:35
is going to be good or bad for our
00:53:36
brains?
00:53:40
I think in the short run it's going to
00:53:41
be bad because
00:53:45
your brain is going to do less and
00:53:48
that's bad for the brain. I I think it's
00:53:52
fascinating to watch what's going to
00:53:54
happen. And ultimately, in the words of
00:53:58
my friend Byron Katy, argue with
00:54:01
reality, welcome to hell.
00:54:04
We need to figure out how to use it to
00:54:07
enhance our lives rather than to steal
00:54:11
brain development.
00:54:13
>> Here's the first most replayed moment.
00:54:15
There was a study done in 2007 that
00:54:18
showed Can't even say it.
00:54:20
>> Curcumin.
00:54:21
>> That shows curcumin upregulates anti-
00:54:26
oxidant defenses and downregulates
00:54:28
oxidative stress.
00:54:30
>> Yeah. There was a study done in 2016
00:54:32
which is a meta analysis of random
00:54:35
control trials found curcuminium
00:54:37
comparable to ibuprofen in terms of pain
00:54:40
relief.
00:54:41
>> Yeah, there there's a lot of work on
00:54:44
kurcamin and turmeric. As I said, a lot
00:54:46
of people get confused because they
00:54:47
think the it only works if you absorb it
00:54:49
into the blood and I'm saying that
00:54:51
actually you don't. What you do is you
00:54:54
work with the microbiome to make it
00:54:56
useful. And there's early preclinical
00:54:59
studies taking place around the impact
00:55:01
it can have with cancers. And there's
00:55:03
promising but early studies showing the
00:55:05
impact that curcumin that comes from
00:55:07
turmeric can have on brain health.
00:55:08
>> Yes. Well, that's uh focus is switching
00:55:11
on to the blood supply to the brain.
00:55:15
What we call the vascular effects on the
00:55:18
brain. And there's something that we
00:55:20
used to call the blood brain barrier
00:55:22
which you've probably heard of which is
00:55:24
seen to be the place where the barrier
00:55:27
that stops a lot of stuff entering the
00:55:29
brain and potentially upsetting it. We
00:55:31
now know this bloodb brain barrier is a
00:55:34
very dynamic interesting interface
00:55:37
between the brains tissue and the rest
00:55:41
of us. It's now called the
00:55:43
neurovvascular unit, NVU.
00:55:46
And it is so exciting. And the more we
00:55:50
look at it so far, the more we find that
00:55:53
the things that help the neurovvascular
00:55:56
unit, the bloodb brain barrier are
00:55:58
plants. And we have green tea. And you
00:56:02
know we can if you if you really want to
00:56:05
help um our brain health regular
00:56:09
drinking of green tea you know
00:56:12
is has been shown to be really useful.
00:56:14
Not that rather than the supplement by
00:56:16
the way is the drink that you have um oh
00:56:19
I put it in here right so we can make
00:56:22
it.
00:56:24
So as you make that can you explain to
00:56:26
me why green tea is a good idea
00:56:31
>> because it contains a number of again
00:56:34
polyphenols
00:56:35
>> and polyphenols are those
00:56:36
>> are these colors
00:56:37
>> these colors yeah
00:56:38
>> in this case it's green obviously and me
00:56:40
green tea is just the smoked unprocessed
00:56:43
part of the tea leaf so it's a plant
00:56:46
called chameleia senses um
00:56:53
so this is nice Japanese teapot. That's
00:56:56
the sort of thing you'd have green tea
00:56:57
in. And these are the mugs, but we've
00:56:59
filled these up already with uh ginger
00:57:02
and cinnamon. So, let's let's leave it
00:57:05
for a moment, but we can while it's
00:57:07
sitting there for a while. There are a
00:57:09
number of these polyphenols in green tea
00:57:11
that seem to be particularly
00:57:15
effective in modulating that barrier. We
00:57:17
talked about the neurovvascular unit
00:57:19
between the brain and the rest of us.
00:57:22
And um there's all sorts of reasons why
00:57:25
regular consumption of green tea seems
00:57:27
to be linked to less of this sort of
00:57:30
trouble.
00:57:30
>> What what sort of trouble?
00:57:32
>> The dementia type problems, the
00:57:33
cognitive decline as they get older.
00:57:36
>> Do they find that in cultures where they
00:57:37
drink a lot of green tea, they have less
00:57:39
dementia?
00:57:39
>> Yeah. But that doesn't mean there's a
00:57:41
cause and effect. So you need a few
00:57:42
other things to establish that. What
00:57:45
we're finding is that other plants have
00:57:48
very likely powerful effects in this
00:57:50
area. And I mentioned the rosemary. Now
00:57:52
all you need to do to appreciate
00:57:55
rosemary is to press it and sniff.
00:57:59
>> Oh, it smells so good. Really nice.
00:58:02
>> That's not just nice because what you're
00:58:04
doing there is you're inhaling volatile
00:58:06
oils,
00:58:07
>> the things that give the smell.
00:58:09
>> And when you're inhaling,
00:58:11
they're literally going into your brain
00:58:14
because part of the brain actually
00:58:16
reaches the outside world. It's called
00:58:18
the alactory lobe. And when you inhale
00:58:21
something, it literally moves into the
00:58:23
brain and from there into the lyic
00:58:26
system. Remember there's a line in a
00:58:29
Shakespeare play called Hamlet Ailia
00:58:32
the young lady says rosemary that's for
00:58:36
remembrance
00:58:38
>> because everyone knew that this improved
00:58:40
cognitive functions and when I was in
00:58:43
working on our campus in Maryland we
00:58:45
actually did a clinical trial with
00:58:47
rosemary in people with struggling with
00:58:50
their crosswords you know as they get
00:58:52
older and found that although it wasn't
00:58:54
a conclusive study there were pointers
00:58:56
to it's improving cognitive or
00:58:58
performance in those people and there's
00:59:01
been other studies since that re that
00:59:03
reinforce that. I would say that
00:59:05
rosemary is one of the ones to watch in
00:59:08
terms of long-term brain health. There's
00:59:10
another remedy called GKO that a lot of
00:59:13
people know about which is used as a
00:59:15
prescription medicine in Europe uh for
00:59:18
cardiovascular problems and that's been
00:59:20
shown to be likely useful and using the
00:59:24
same sort of mechanisms as as we've seen
00:59:26
here and with the green tea. I'll check
00:59:30
it here. Yeah, that looks all right.
00:59:36
You see, it's more yellow than green,
00:59:38
but uh
00:59:40
and this is flavored with a little bit
00:59:42
of mint to make it a little more
00:59:44
agreeable. Sometimes people find green
00:59:46
tea is not their favorite taste. Green
00:59:49
tea is rich in polyphenols, um which are
00:59:52
linked to benefits ranging from heart
00:59:54
and brain health to fat loss and cancer
00:59:56
prevention.
01:00:00
>> It's got a nice minty flavor.
01:00:03
>> Yeah.
01:00:04
>> You can live with that, couldn't you?
01:00:05
>> Yeah. Yeah,
01:00:06
>> my girlfriend again, she she's all over
01:00:07
this stuff. She's always bloody right.
01:00:09
>> Well, you know that learned that lesson
01:00:11
a long time ago.
01:00:12
>> I know, right? Like I say it all the
01:00:13
time on this podcast, but she's always
01:00:14
like 2, three years ahead of what then
01:00:17
someone really, really smart comes and
01:00:19
tells me and I spend those two or three
01:00:21
years in denial. I'm like, what the
01:00:22
is she like doing over there? Don't get
01:00:24
me started on cacao. If you start
01:00:25
talking to me about cacao, no, no, no,
01:00:27
no, no. She's been telling me
01:00:29
>> I'm gonna I'm gonna nail this because
01:00:31
there's a lot of people listening who
01:00:32
will want to hear this.
01:00:33
>> Okay,
01:00:34
>> Coco. Yeah,
01:00:35
>> chocolate, dark chocolate is a medicine.
01:00:39
End of
01:00:41
one of the best medicines around is 50 g
01:00:45
or 100 g of 75% or more dark chocolate.
01:00:49
Do you know what I've just realized? My
01:00:51
girlfriend, she's going to live till
01:00:52
she's 150 because she all she eats 90%
01:00:56
or something 80% dark chocolate. She
01:01:00
drinks green tea all day. She has
01:01:04
the ginger and cinnamon drinks all day.
01:01:08
She eats the the full rainbow.
01:01:10
>> She should be stepping in for you.
01:01:12
>> I know. I I know. Exactly.
01:01:14
>> No, Coco. Seriously,
01:01:18
brain health as well,
01:01:20
>> cardiovascular health.
01:01:22
>> I mean, they just they do studies where
01:01:24
they've put coco into volunteers. That
01:01:27
means students usually um you know so
01:01:29
young kids and they were able to show
01:01:32
changes in the blood flow within minutes
01:01:37
certainly within an hour of eating cocoa
01:01:41
>> beneficial changes in your blood flow.
01:01:43
>> They call it the heart medicine.
01:01:45
>> Yeah. No heart circulation brain.
01:01:49
>> So she's um my girlfriend's very
01:01:51
spiritual. She runs a business called
01:01:52
Bali Breathwork. Um #ad if I have to say
01:01:55
that. But in her business, one of the
01:01:57
things she does at the very start of the
01:01:58
session with women all over the world
01:02:00
that come to her retreats is she makes
01:02:02
cacao for them. And
01:02:05
you notice instantly how people change
01:02:08
when they've had a hot cup of cacao.
01:02:10
It's and and she says it like almost
01:02:12
brings out their heart. And I guess
01:02:14
that's because of the circulation
01:02:15
reasons. Yes,
01:02:16
>> it is. But it also of course we know it
01:02:19
contains a few other beneficial
01:02:21
stimulate stimulating effects sort of
01:02:23
similar to the effects with coffee which
01:02:26
in certainly as I've already said is a
01:02:27
medicine as well. Uh but cocoa and
01:02:30
chocolate does have a uplifting effect
01:02:33
which is why we love it. So
01:02:35
>> and we have to be clear here we're not
01:02:36
talking about hot chocolate that comes
01:02:38
from a packet or something necessarily.
01:02:40
>> We would like it to be as dark as
01:02:42
possible.
01:02:43
>> Okay. Sorry,
01:02:44
>> the less sugar, the less fat. Um, so we
01:02:48
talk about 75% cocoa solids, you know,
01:02:50
so it's dark chocolate and it tastes a
01:02:53
bit more medicinal, doesn't it? It's not
01:02:54
as sweet. Um, but I'm saying to many of
01:02:57
my patients, take 50 g a day. It's a
01:03:00
medicine.
01:03:02
>> Damn, she's right. My fridge is full of
01:03:05
dark chocolate. I tend to avoid it, but
01:03:07
the drawer of my fridge has all of her
01:03:09
dark chocolate in, and it's she she
01:03:11
likes it 90%. If she can get a 90%
01:03:13
she'll take it.
01:03:14
>> Yeah. 90% is quite good now.
01:03:17
>> Yeah.
01:03:17
>> Yeah.
01:03:18
>> Having a look at the green tea.
01:03:23
There was a study done in 2008 which
01:03:25
supports how it improved cognitive
01:03:27
function, memory, attention accuracy and
01:03:30
um long-term consumption associated with
01:03:32
lower risk of cognitive decline and
01:03:34
Alzheimer's disease according to the
01:03:36
Journal of Nutritional Biochemistry in
01:03:38
2011.
01:03:39
It's nice to have somebody else just say
01:03:41
what you said.
01:03:42
>> Yeah, but it's it's ex exactly. I didn't
01:03:45
realize that. I didn't I had no idea.
01:03:48
I had no idea.
01:03:50
All those times I turned it down when
01:03:52
she offered it to me.
01:03:54
>> You can't say sorry.
01:03:55
>> I have literally literally I've got a
01:03:57
Wow. heart health, brain function, fat
01:04:01
burning and metabolism, cancer
01:04:03
prevention, early evidence, blood sugar
01:04:05
and insulin sensitivity, gut and oral
01:04:07
health.
01:04:12
If there's anything we need, it is
01:04:14
connection. Especially in the world
01:04:15
we're living in today. And that is
01:04:17
exactly why we created these
01:04:19
conversation cards. Because on this
01:04:20
show, when I sit here with my guest and
01:04:22
have those deep, intimate conversations,
01:04:25
this remarkable thing happens time and
01:04:27
time again. We feel deeply connected to
01:04:30
each other. At the end of every episode,
01:04:31
the guest I'm interviewing leaves a
01:04:33
question for the next guest, and we've
01:04:35
turned them into these conversation
01:04:37
cards. And we've added these twist cards
01:04:39
to make your conversations even more
01:04:40
interesting. And there are so many more
01:04:43
twists along the way with the
01:04:44
conversation cards. This is the brand
01:04:45
new edition. And for the first time
01:04:47
ever, I've added to the pack this gold
01:04:49
card, which is an exclusive question
01:04:51
from me. But I'm only putting the gold
01:04:54
cards in the first run of conversation
01:04:57
cards. So get yours now before the
01:04:58
limited edition gold cards are all gone.
01:05:01
Head to the link in the description
01:05:02
below.

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    Best concept / idea

Episode Highlights

  • The Power of a Healthy Brain
    Our thoughts, feelings, and relationships all start in the brain. A healthy brain is essential for a meaningful life.
    “This all starts with having a healthy brain.”
    @ 00m 28s
    December 26, 2025
  • The Importance of Sleep
    Sleep is critical for memory consolidation and cleaning up brain metabolites. Lack of sleep can lead to serious consequences.
    “You cannot function if you are deprived of sleep for too many hours in a row.”
    @ 09m 46s
    December 26, 2025
  • Social Connections and Longevity
    Strong social connections can lead to a longer life and better brain health. Loneliness can have detrimental effects.
    “Loneliness causes stress that damages the brain and can make it smaller.”
    @ 13m 09s
    December 26, 2025
  • Creatine and Cognitive Function
    Studies show creatine can negate cognitive deficits caused by sleep deprivation, enhancing brain function.
    “Creatine can negate cognitive deficits of sleep deprivation.”
    @ 19m 49s
    December 26, 2025
  • Neuroplasticity and Change
    The concept of neuroplasticity suggests that we can change our identities and overcome past traumas.
    “Neuroplasticity means I can literally change who I am.”
    @ 27m 23s
    December 26, 2025
  • Learning and Neuroplasticity
    Learning is possible at any age through neuroplasticity, which requires attention and rest.
    “You can learn anything you want to learn provided there's a shift in the neurochemical environment.”
    @ 29m 56s
    December 26, 2025
  • The Role of Nitric Oxide
    Nitric oxide is crucial for blood flow and regulating vascular health. It plays a significant role in preventing cardiovascular diseases.
    “Nitric oxide is a gas that regulates blood flow.”
    @ 37m 15s
    December 26, 2025
  • Erectile Dysfunction as a Warning Sign
    Erectile dysfunction is now recognized as a symptom of nitric oxide deficiency, indicating potential cardiovascular issues.
    “Erectile dysfunction is a symptom of loss of nitric oxide.”
    @ 39m 34s
    December 26, 2025
  • The Dangers of Sugar
    Sugar is not just a sweetener; it's a toxin that can severely impact your health, including nitric oxide production.
    “Sugar is a toxin. It’s a poison.”
    @ 42m 38s
    December 26, 2025
  • Microplastics and Brain Health
    Microplastics are linked to hormone disruption and can have detrimental effects on brain function.
    “Microplastics are awful for the brain.”
    @ 51m 15s
    December 26, 2025
  • Cacao as Medicine
    Dark chocolate has been shown to have beneficial effects on heart and brain health.
    “Chocolate, dark chocolate is a medicine.”
    @ 01h 00m 39s
    December 26, 2025
  • The Power of Green Tea
    Regular consumption of green tea is linked to reduced cognitive decline and dementia.
    “It’s nice to have somebody else just say what you said.”
    @ 01h 03m 41s
    December 26, 2025

Episode Quotes

Key Moments

  • Healthy Brain Focus00:37
  • Social Connections Matter13:09
  • Learning Potential29:56
  • Nitric Oxide Explained37:15
  • Sugar's Toxicity42:38
  • Chronic Stress Effects49:42
  • Cacao Rituals1:02:00
  • Connection Cards1:04:45

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