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Lewis HowesThe BITTER TRUTH About Sugar: How It's KILLING YOU! | David Perlmutter & Lewis Howes
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85 min read · 17,122 words- 0:00 – 1:21
Food, metabolism, and fear-based brain activity
- DPDr. David Perlmutter
The foods that you eat are speaking right now to your DNA. Narcissism is really, uh, just the amygdala doing its thing. Glucose goes up with diabetes, so we've gotta limit that. Eat more fructose. Bad idea. Bad recommendation.
- LHLewis Howes
I think you gotta have a dream.
- SPSpeaker
The School of Greatness.
- LHLewis Howes
Really? [laughs] Yeah.
- SPSpeaker
Please welcome Lewis Howes.
- LHLewis Howes
What are those main foods or ingredients that keep us in fear-based brain activity as opposed to the-
- DPDr. David Perlmutter
It's an excellent question. So it's, it's really foods l- that threaten metabolism. In other words, refined carbohydrates, foods to which you may be sensitive as a unique individual, and foods that tend to elevate uric acid. So, uh, and these are the foods of the day. By and large, the, the biggest issue for us is fructose.
- LHLewis Howes
Mm-hmm.
- DPDr. David Perlmutter
Leads to uric acid and turns on inflammation, turns on oxidative stress, uh, does other things that we'll talk about. But beyond that, um, through the lens of what that's doing to our thinking process and locking us into amygdala-based behavior, it's a big deal.
- LHLewis Howes
Wow.
- DPDr. David Perlmutter
It's, it's, uh... And we're watching it play out around the world.
- LHLewis Howes
Yes.
- DPDr. David Perlmutter
I mean, you know, you feel the shift. Yeah, and there w- there was always, uh, you know, conflict in the world, but there's never been the polarization like we're seeing, we're seeing now.
- LHLewis Howes
I know.
- 1:21 – 4:55
Amygdala vs. prefrontal cortex: compassion, narcissism, and inflammation
- DPDr. David Perlmutter
And the lack of compassion for your fellow human. You know, the Dalai Lama said that, "If you want others to be happy, practice compassion. But if you wanna be happy, practice compassion."
- LHLewis Howes
Hmm.
- DPDr. David Perlmutter
So it works. That's tapping into your prefrontal cortex.
- LHLewis Howes
It's funny, I was just interviewing a, um, a therapist psychologist, Dr. Ramani Navrasala, who is the, the leading expert on narcissism, and narcissism personality disorders and all things narcissist. And I'm curious if part of narcissism are these fear-based, you know, reactive thoughts and, and emotions could be diminished by the things people eat, and be less narcissistic because most narcissists aren't compassionate.
- DPDr. David Perlmutter
We have two chapters on that exact topic.
- LHLewis Howes
Really?
- DPDr. David Perlmutter
Oh, yeah.
- LHLewis Howes
In the book?
- DPDr. David Perlmutter
Not in that book.
- LHLewis Howes
Okay. In-
- DPDr. David Perlmutter
In the book I'm gonna send you, Brain Wash.
- LHLewis Howes
Wow.
- DPDr. David Perlmutter
Uh, but you are correct. Uh, so narcissism is really, uh, just the amygdala doing its thing, that it's all about me. It's all about, ultimately, my fears. So it's, it's a very fear-based, uh, program from which the brain and reality i- the brain operates and reality is seen, and doesn't, uh, really have the door open in any way for other, the feelings of others and how I'm, what I might do to be helpful for that other person.
- LHLewis Howes
Really?
- DPDr. David Perlmutter
So it... And so as I described, food, because it separates, it segregates the, uh, prefrontal cortex from the amygdala.
- LHLewis Howes
The amygdala is the fear-based part of the brain, right?
- DPDr. David Perlmutter
But it dictates behavior.
- LHLewis Howes
The amygdala dictates behavior.
- DPDr. David Perlmutter
That's right.
- LHLewis Howes
So if it's turned on in fear-based all the time, you're, it's pretty hard to have a compassionate, calm behavior.
- DPDr. David Perlmutter
You are locked out from that. You're kept out of God's kingdom.
- LHLewis Howes
Wow.
- DPDr. David Perlmutter
Yeah. So w- this prefrontal cortex is, exercises the control, reins that in and says, "Hey, you know, I know you want to eat this food now. I know you wanna do this. I know you wanna be a bully and hit somebody."
- LHLewis Howes
[laughs]
- DPDr. David Perlmutter
"But we're gonna rein that in, because there's a, there's a better purpose here in life, you know?" And that's what we, that's our gift as humans, the opposable thumb and this prefrontal cortex, right?
- LHLewis Howes
Yes.
- DPDr. David Perlmutter
And that, so that superhighway, that communication that's bidirectional, uh, we really depend upon to get the job done as humans living together on this planet. When that is compromised for any number of reasons, we don't have that ability, and we're locked into that other mentality, clearly a mentality that's based on a reptilian brain, that is f- uh, you know, feasting, uh, it's fear-based, and, you know, reproduction. Basically, that's it. It's all about my needs and-
- LHLewis Howes
What I want
- DPDr. David Perlmutter
... what I want, and right now.
- LHLewis Howes
That's the amygdala.
- 4:55 – 5:44
Off-ramps: meditation, nature, sleep, and tracking blood sugar
- LHLewis Howes
So how do you get out of that?
- DPDr. David Perlmutter
Well, so we offered up what are the off-ramps. Uh, a, a whole program based upon what you can do to choose to meditate for a few minutes a day.
- LHLewis Howes
Mm-hmm, mm-hmm.
- DPDr. David Perlmutter
We'll expand that with time. Getting out in nature, getting enough restorative sleep. Perhaps, um, you know, being a little bit more proactive about following your blood sugar.
- LHLewis Howes
Mm-hmm.
- DPDr. David Perlmutter
In that book, we didn't talk about continuous glucose monitoring. We have a whole section in h- uh, in this book about that. But talked about those foods, if you could give us one week, we're gonna help you redirect.
- LHLewis Howes
So in Brain Wash, you have a couple chapters on narcissism specifically?
- DPDr. David Perlmutter
Oh, yeah. Well, actually-
- LHLewis Howes
Really?
- DPDr. David Perlmutter
... when you really read the book, you're gonna realize that it's throughout the book.
- LHLewis Howes
Wow.
- DPDr. David Perlmutter
That it, it's a commentary about where we are-
- LHLewis Howes
As a society
- DPDr. David Perlmutter
... how we got there-
- LHLewis Howes
Yeah
- DPDr. David Perlmutter
... and why, what you can do now to get us away from that.
- 5:44 – 8:17
Social media, appearance culture, and what ‘matters’
- LHLewis Howes
Well, it's cr- I mean, with social media and the s- and using s- I think everything's a tool
- DPDr. David Perlmutter
There's a chapter on that as well.
- LHLewis Howes
I think everything's a tool. You can use social media to benefit people, or you can use social media to benefit yourself.
- DPDr. David Perlmutter
Yeah.
- LHLewis Howes
With the selfie culture, right, of, of me, me, me, look at me, me, me. And, um- I'm curious how that plays in with our eating habits and nutrition habits based on the, the, I guess the, the psychological seeing yourself all the time and getting attention for how you look all the time on social media from random strangers. As opposed to when you just used to walk out in the street and get attention, but now it's just-
- DPDr. David Perlmutter
Right
- LHLewis Howes
... like in a moment you can get this dopamine hit.
- DPDr. David Perlmutter
The, the original term for that was Snapchat dys- dysmorphia, where you had to cultivate your, uh, social media appearance, not so much your, your real appearance of what, what people will experience face-to-face in terms of not just what you look like, but what do you got underneath it.
- LHLewis Howes
Mm.
- DPDr. David Perlmutter
Which is truly what matters, right?
- LHLewis Howes
Right.
- DPDr. David Perlmutter
It's really less about what you look like. It's about what, you know, what you portray, what you are ab- how you interact, what is your message. What is the message? What is your contribution?
- LHLewis Howes
Mm-hmm.
- DPDr. David Perlmutter
And so to me, I think really seems to matter, but you know, that stuff is so underrated now. It's all about what you look like, and it has to be within the first three or four seconds, and that's end of story.
- LHLewis Howes
So in Brain Wash, all right, you're talking about social media, narcissism, and all these different things. How are those affecting us in what we choose to eat as well? Is it part of the cycle when we get these dopamine hits for looking good or our social media, do we then choose to eat certain foods from that? Or what does that-
- DPDr. David Perlmutter
No, I think that, uh, that's an excellent question, and I think that, uh, the answer's no.
- LHLewis Howes
Okay.
- DPDr. David Perlmutter
Because I think, um, we either eat what we want to eat or we eat what we know is good for us.
- LHLewis Howes
Mm.
- DPDr. David Perlmutter
Now, what we want to eat, what's deep in our brains, is sugar.
- LHLewis Howes
Yes.
- DPDr. David Perlmutter
So we are deeply programmed.
- LHLewis Howes
[laughs] Yep.
- DPDr. David Perlmutter
Every person walking the planet. You're, you're laughing-
- LHLewis Howes
That's-
- DPDr. David Perlmutter
... 'cause you know exactly what I'm talking about
- LHLewis Howes
... that's my, that's my vice. You know, I don't-
- DPDr. David Perlmutter
Of course it is
- LHLewis Howes
... I don't drink. I've never been drunk in my life. I don't drink alcohol. I don't smoke. I don't do drugs. But sugar is a thing that when I'm disciplined, I can be completely off of it.
- DPDr. David Perlmutter
When the prefrontal cortex-
- 8:17 – 11:21
Why humans crave sugar: evolutionary programming and modern mismatch
- LHLewis Howes
What are the main risks of sugar in the first place? And, and why should we be aware of it before figuring out how to get it under control?
- DPDr. David Perlmutter
Well, let me go back to just, uh, the, the notion of your sugar-
- LHLewis Howes
Yeah
- DPDr. David Perlmutter
... uh, desire.
- LHLewis Howes
Uh-huh.
- DPDr. David Perlmutter
Uh, you are like, I would say, mm, seven plus billion people.
- LHLewis Howes
[laughs]
- DPDr. David Perlmutter
Meaning it's what let us survive.
- LHLewis Howes
Mm.
- DPDr. David Perlmutter
Our desire for sweet. We're deeply programmed. It's not learned. It, it's not an app that we picked up along the way. It came when you bought that computer. It was built into the hard drive, that we will seek out sweet. Why? 'Cause sweet tells us that a food is safe.
- LHLewis Howes
Mm.
- DPDr. David Perlmutter
It tells us that it is ripe, meaning highest in nutrients. It's good for the fruit because that's when the seeds of that fruit need to be dispersed. So everything works together. Um, but it also tells us that winter's coming.
- LHLewis Howes
Mm.
- DPDr. David Perlmutter
Which means it tells our bodies to shift metabolism and start making and storing fat. And it turns out that the, the danger signal that winter's coming, the signal that tells your body to make that happen involves uric acid.
- LHLewis Howes
Mm.
- DPDr. David Perlmutter
And this is something that happened to our ancestors around 14 to 17 million years ago when the Earth became cool. And certain primates who developed mutations in the genes that dealt with an enzyme called uricase that breaks down uric acid, they developed mutations that turned, uh, that enzyme off so they couldn't break down uric acid, so uric acid levels would elevate. They survived. Not that they got fat-
- LHLewis Howes
Mm, right
- DPDr. David Perlmutter
... but they stored just a little bit more fat, so they might survive, whereas the other primate might not, and then they would pass the genes on. And that comes to us. That's why we make fat when we're exposed, for example, to fructose. It was a powerful survival mechanism, and we carry it today. The problem is now fructose is everywhere, every, in every food we eat, so we're suffering from this evolutionary environmental mismatch. I mean, that's the, the-
- LHLewis Howes
Mm
- DPDr. David Perlmutter
... premise of the paleo movement.
- LHLewis Howes
Mm-hmm, right.
- DPDr. David Perlmutter
Let's try to, uh, emulate an environment that our paleolithic ancestors must have experienced in terms of lifestyle, exercise, activity, and certainly food and sleep. Um, so it's not that the gene is necessarily bad. It's the context of today, uh, bombarding that gene pathway with the signal that says, "You better make fat and make it fast because winter's coming and you need to be ready. You need to lay down some fat. You need to raise your blood sugar to power your brain because there's not gonna be any food. You need your brain so that you can forage and find-
- LHLewis Howes
Mm-hmm
- DPDr. David Perlmutter
... some food." That's our ace in the hole.
- LHLewis Howes
Mm.
- DPDr. David Perlmutter
That's our high card. So that's why there's all this excitement then about the relationship between fructose, the downstream metabolite, which is uric acid, making more sugar, making more fat, and really a central player in our metabolic mayhem.
- 11:21 – 12:29
Sugar, metabolic disruption, and brain degeneration (Alzheimer’s as inflammation)
- LHLewis Howes
And how much does sugar affect the brain?
- DPDr. David Perlmutter
Well, the, the brain does run on a form of sugar called glucose.
- LHLewis Howes
Mm-hmm.
- DPDr. David Perlmutter
And there is even some suggestion that the brain can metabolize a, a small amount of fructose. That's really kind of recent data. But how it, uh, th- the brain is not tolerant to any significant degree of disruption of our metabolism, this, what I call metabolic mayhem. Because this disturbance of our metabolism sets the stage then for inflammation, and that is the underlying cornerstone of brain degeneration.
- LHLewis Howes
Mm.
- DPDr. David Perlmutter
Alzheimer's is an inflammatory disease. Like coronary artery disease, type 2 diabetes, obesity, these are inflammatory conditions. So You know, Alzheimer's is very much the brain on fire, which is what the word inflame, inflammation means, to be on fire. So we've got to do everything we can to put the fire out as a, you know, an intervention.
- LHLewis Howes
And to prevent it as well.
- DPDr. David Perlmutter
Yeah.
- LHLewis Howes
So it doesn't get there.
- DPDr. David Perlmutter
And, and to, uh-
- LHLewis Howes
Have there been cases, not to go off topic here, but have there been cases of people where-
- DPDr. David Perlmutter
We're, we're, we're deep into the woods
- LHLewis Howes
[laughs]
- DPDr. David Perlmutter
We're good.
- 12:29 – 14:54
Reversing cognitive decline and the limits of ‘one magic pill’ medicine
- LHLewis Howes
Have there been cases where people have had Al- Alzheimer's that have reversed it? Is that possible, yes?
- DPDr. David Perlmutter
Yes.
- LHLewis Howes
Really?
- DPDr. David Perlmutter
There are. It's, uh ... There are books written about it. In fact, I wrote the forward to a book, uh, by Dr. Dale Bredesen, who is here in LA, um, at UC- at UCLA, and he has reversed it now in over 100 patients-
- LHLewis Howes
Come on
- DPDr. David Perlmutter
... who have ... Oh, absolutely.
- LHLewis Howes
Early stage or is this like the-
- DPDr. David Perlmutter
Uh, early to moderate, yeah.
- LHLewis Howes
Wow.
- DPDr. David Perlmutter
Yeah. He's gotten people back to work.
- LHLewis Howes
Wow.
- DPDr. David Perlmutter
So we live in a world, western medicine, of monotherapy and, you know, we're going to create a magic pill for you that will take your diabetes away, for example. Uh, I was giving a talk in New Jersey to, ah, 500 mainstream doctors. Why they chose me, I don't know. But I said, "How do you treat, uh, diabetes?" And people would raise their hand and say, "Oh, I use such and such a drug. I use this or that." And then I said, "Well, what happens when you stop using that medication?" They said, "Well, within a day or two the blood sugars go up." So I asked the question, "Did you really treat the diabetes?" And then I presented data from a Dr. Sarah Hallberg where using a ketogenic diet reestablishes insulin sensitivity and people don't need medication.
- LHLewis Howes
Mm-hmm.
- DPDr. David Perlmutter
Published research. That's treatment.
- LHLewis Howes
Yeah.
- DPDr. David Perlmutter
So again, we're not treating diabetes with a drug and we don't have a drug for Alzheimer's. Doesn't exist. I wish there were such a thing.
- LHLewis Howes
Right.
- DPDr. David Perlmutter
We know what happened with this Aduhelm drug that was put out in February of this past year. And finally, mainstream neurology said, "You know what? This isn't working."
- LHLewis Howes
Hmm.
- DPDr. David Perlmutter
And challenges the notion that this accumulation of beta amyloid is the cause of Alzheimer's. Getting back to Dr. Bredesen, he's identified 36 different inputs that can affect the brain in different ways and identifies in each patient what is disrupted. Is it brain energetics, meaning the brain's inability to use glucose as a fuel? Is it inflammation?
- LHLewis Howes
Hmm.
- DPDr. David Perlmutter
Is it toxic? Is it infectious? Uh, is it previous trauma? What is going on in the brain? Let's work on that rather than one size fits all, you're gonna take this pill and lo and behold, you're gonna get better. So it's a paradigm shift and I was, uh, in the intro to his book or the forward, I said, "You know, this is on par with washing your hands before delivering a baby."
- LHLewis Howes
Hmm.
- DPDr. David Perlmutter
You know, it's that big of a deal.
- 14:54 – 22:29
Prevention starts decades early: inflammation, waist size, scans, and early-life factors
- LHLewis Howes
What would you say based on all the research you've done and also with these other doctors you've worked with would be the three or four or five key things to eliminate or to do to prevent Alzheimer's or to start reversing it in the early stages?
- DPDr. David Perlmutter
So again, I think the most important thing is to realize that it begins a lot earlier than you think.
- LHLewis Howes
How early?
- DPDr. David Perlmutter
30 years before clinical symptoms-
- LHLewis Howes
Ooh
- DPDr. David Perlmutter
... at least. That's what, you know, our peer-reviewed literature is telling us.
- LHLewis Howes
Wow.
- DPDr. David Perlmutter
And I, and I'll tell you why.
- LHLewis Howes
Mm-hmm.
- DPDr. David Perlmutter
Because a study that appeared in the, uh, journal, uh, Neurology looked at, uh, created what's called an inflammatory c- composite score and they looked at people, uh, they, they did blood work and they, they created an, uh, a marker of their level of inflammation and then they went back and evaluated them 28 years later and they perfectly correlated who got Alzheimer's with how high their inflammation-
- LHLewis Howes
My gosh
- DPDr. David Perlmutter
... score was 28 years before.
- LHLewis Howes
Oh, my gosh.
- DPDr. David Perlmutter
Now, we've seen the same thing with waist circumference. Three decades. We've seen the same thing with brain scans that look at glucose utilization are predictive long before people began to forget their grandchildren's names. So the point is, when does it begin? Does it begin in the 30s? And I would submit it begins a lot earlier, that when we see-
- LHLewis Howes
Wow
- DPDr. David Perlmutter
... adolescents now that are diabetic, that are obese and s- or significantly overweight, uh, when we see, uh, teenagers, uh, in high school e- experiencing head trauma from contact sports, these are issues that are profound. We know that, uh, inflammation, the set point of inflammation to some degree is determined before a child is even born based upon the gut bacteria-
- LHLewis Howes
Oh, my gosh
- DPDr. David Perlmutter
... of the mother. And we know that, for example, how a child is even born, vaginal birth versus cesarean birth plays a huge role in determining that child's level of inflammation, immune function, risk for autoimmunity, and even risk for obesity later in life.
- LHLewis Howes
Based on how they're delivered.
- DPDr. David Perlmutter
How they're delivered. If a child is born by C-section, doesn't pass through the vaginal birth canal, doesn't get those bacteria that are there to anoint that child. Passing through the birth canal puts bacteria in the mouth and the nose and the eyes, throughout the body of that child that then are the seeds to create that microbiome for that living being.
- LHLewis Howes
Wow.
- DPDr. David Perlmutter
As opposed to picking up bacteria in the operating room because mom had to have a C-section. There is a time and a place for a C-section.
- LHLewis Howes
Wow.
- DPDr. David Perlmutter
But a third of American births are C-section right now.
- LHLewis Howes
Right.
- DPDr. David Perlmutter
So-
- LHLewis Howes
So you're saying if there's like this is an extreme complication where we've gotta do a C-section, that's when you say-
- DPDr. David Perlmutter
Totally
- LHLewis Howes
... "Hey, yeah, we want everyone safe."
- DPDr. David Perlmutter
Yeah. I mean, the, the umbilical cord's wrapped around the child's ne- whatever it might be.
- 22:29 – 28:13
Exercise as the most validated intervention: BDNF and hippocampus changes
- DPDr. David Perlmutter
... docosahexaenoic acid, generally, uh, from fish oil, although there's a vegetarian form of that. But I think the, the biggest, uh, lever that can be pulled, uh, provided a diet is reasonable, would be aerobic exercise.
- LHLewis Howes
Really?
- DPDr. David Perlmutter
So this is profound. So this is a, an epigenetic player. This turns on the genes that make something called BDNF, brain-derived neurotrophic factor, which is fundamental for healing damaged neurons, but also for nurturing them, allowing them to do what they can do and should do, but also stimulates what is called synaptogenesis, where brain cells connect to each other, and even allows the human brain to grow new brain cells. Who knew?
- LHLewis Howes
When you're doing aerobic exercise?
- DPDr. David Perlmutter
Yes.
- LHLewis Howes
So even if you have, let's say, not the cleanest diet and you have some sugar here and there, maybe you have some wine or some alcohol or whatever it is, um, you're saying doing consistent aerobic ex- exercise will help defend against all those things as well? Could help?
- DPDr. David Perlmutter
Well, again, it's not that your guest today is, is saying that. That's what the literature shows. It's profound. So, uh, the work, the original work is done, uh, by Dr. Erickson at University of, of Pittsburgh.
- LHLewis Howes
Okay.
- DPDr. David Perlmutter
And, uh, fascinating research looking at, uh, two groups of individuals, several hundred in each group. One group got a stretching program and one group got an aerobics program. Now, I'm not knocking stretching. I mean, that's very important, but the aerobics part, uh, you know, pushing up your heart rate, uh, is what seems to be im- very important for augmenting this production of this BDNF.
- LHLewis Howes
How long is the, the, the heart rate up for, or how long is the program? Like, 20, 30 minutes or-
- DPDr. David Perlmutter
It was variable, but my-
- LHLewis Howes
Right
- DPDr. David Perlmutter
... recommendation is minimum of 20 minutes.
- LHLewis Howes
Okay.
- DPDr. David Perlmutter
What should that heart rate be? Depends obviously on the person. I typically say 180 minus your age as a ballpark. Now, that might be too low for some people, too high for some people. But, um- You know, that's where you use a wearable and you see where you're comfortable. I typically say you should be, um, breathing hard but not hard enough that you can't have a conversation with somebody.
- LHLewis Howes
Okay.
- DPDr. David Perlmutter
I mean, these are kind of, you know-
- LHLewis Howes
So it's a jog, a, a hard jog.
- DPDr. David Perlmutter
Yeah.
- LHLewis Howes
A light jogger.
- DPDr. David Perlmutter
Well, depending on what, you know, the, it, it-
- LHLewis Howes
A bike, right, yeah
- DPDr. David Perlmutter
... may be walking for somebody.
- LHLewis Howes
Yeah, right.
- DPDr. David Perlmutter
It may be, you know, may be an elliptical machine at a certain rate. Who knows?
- LHLewis Howes
Mm-hmm.
- DPDr. David Perlmutter
But, um, once that happens after a period of time, so this BDNF, uh, starts to get produced, and what did the study show that I'm, I'm quoting? They followed these people for a year. Those who did the aerobics had, uh, in- instead of declining size of their brain's memory center, called the hippocampus, it actually increased during the course of one year. I mean, we expect everything's gonna be on the skids, but here it actually increased and-
- LHLewis Howes
Wow
- DPDr. David Perlmutter
... memory function improved.
- LHLewis Howes
Wow.
- 28:13 – 33:59
How diet advice went wrong: low-fat era, fructose rise, and added sweeteners everywhere
- DPDr. David Perlmutter
risk for, uh, becoming an Alzheimer's patient, a disease for which there is no simple treatment. So we've gotta focus on metabolism. We've gotta keep people from becoming diabetic. We've gotta get the willies when we know that the prediction is that by 2030, 50% of American adults will be obese.
- LHLewis Howes
Come on.
- DPDr. David Perlmutter
2030 is-
- LHLewis Howes
Eight years
- DPDr. David Perlmutter
... eight years from now. You used to think, oh, 2030, you know, the glaciers are melting. That's sometime in the distant future. Thank you, Al Gore. It's eight years from now. Think about that.
- LHLewis Howes
So they're predicting 50% of the US population will be obese.
- DPDr. David Perlmutter
Adults.
- LHLewis Howes
Of adults.
- DPDr. David Perlmutter
It's already one-third of American adults that have high blood pressure. It's already 10% of children between the ages of 12 and 18 that have high blood pressure, that require medication.
- LHLewis Howes
What was it like 30 years ago? Was it-
- DPDr. David Perlmutter
Things were better, but that's just about when things changed. And what happened? What happened was we were all told, not just doctors, but the lay population as well, that fat was the enemy, right? Low fat-
- LHLewis Howes
Mm-hmm
- DPDr. David Perlmutter
... everything.
- LHLewis Howes
Yeah.
- DPDr. David Perlmutter
Low fat Oreos.
- LHLewis Howes
Fat free. Fat free this.
- DPDr. David Perlmutter
Yeah.
- LHLewis Howes
Yeah.
- DPDr. David Perlmutter
Low fat Oreos with that white stuff in the middle that we all loved, right? Who wouldn't? And, uh, w- what happened was because we all went fat free or low fat as mu- as best we could, uh, there was far more carbohydrates and, um, simple carbohydrates in the diet. Sugar consumption skyrocketed. So, uh, between 1970 and 1990, fructose consumption went up 1000%. Now, fructose was, uh, looked upon as being a safer sugar than table sugar per se, or certainly than glucose, because fructose in its metabolism doesn't require insulin, doesn't mess with the insulin issue.
- LHLewis Howes
Mm-hmm.
- DPDr. David Perlmutter
So it was looked upon, it was even recommended by the American Diabetes Association, and yet fructose consumption directly leads to insulin resistance. That's the harbinger for future diabetes. So it is about the worst sugar we could be consuming, and yet we're consuming it, you know, left, right, and center these days.
- LHLewis Howes
Wait, wait, so the American Diabetes Association, is that what you said? They-
- DPDr. David Perlmutter
Said fructose. And-
- LHLewis Howes
They recommended-
- DPDr. David Perlmutter
Yeah
- LHLewis Howes
... that fructose was a he- way to ... prevent type 2 diabe- diabetes
- DPDr. David Perlmutter
We know that if you needed a sweetener, fructose is a better choice
- LHLewis Howes
Use that
- DPDr. David Perlmutter
In other words, high fructose corn syrup, which is 55% fructose-
- LHLewis Howes
Ooh
- 33:59 – 1:00:14
Personal boundaries: CGMs, identity-based food rules, and inflammation awareness
- DPDr. David Perlmutter
Uh, do I still want it and desire it? Absolutely.
- LHLewis Howes
Really?
- DPDr. David Perlmutter
Oh, yeah.
- LHLewis Howes
How do you manage it?
- DPDr. David Perlmutter
I, I, um-
- LHLewis Howes
Do you have it some? Do you have it, you know, seasonally?
- DPDr. David Perlmutter
Oh, there-
- LHLewis Howes
Do you-
- DPDr. David Perlmutter
I definitely eat some fruit. I can't tell you when I had a glass of juice. It's not even in my memory anymore. Um, I will say that, uh, I had some gingerbread-
- LHLewis Howes
[laughs]
- DPDr. David Perlmutter
... and loved every bit of it.
- LHLewis Howes
[laughs]
- DPDr. David Perlmutter
I don't know how much sugar it contained, recently. Uh, but it's generally off the table for me. I mean, I-
- LHLewis Howes
You just-
- DPDr. David Perlmutter
... don't wanna become diabetic. My father died of Alzheimer's. Um, I have a, a c- continuous glucose monitor. I know darn well moment to moment what my foods are doing to me, and I'm keeping my blood sugar-
- LHLewis Howes
Wow
- DPDr. David Perlmutter
... under control.
- LHLewis Howes
You have a blo- uh, monitor on your-
- DPDr. David Perlmutter
I'm traveling right now, so I don't have it on.
- LHLewis Howes
Okay, gotcha. But you usually have it on your shoulder?
- DPDr. David Perlmutter
Left shoulder, yeah.
- LHLewis Howes
Wow.
- DPDr. David Perlmutter
I usually have it right here, a CGM.
- LHLewis Howes
And so you check-
- DPDr. David Perlmutter
Oh, you need to get that. We'll, we'll get-
- LHLewis Howes
Really?
- DPDr. David Perlmutter
... you set up.
- LHLewis Howes
Oh, I know, like-
- DPDr. David Perlmutter
Absolutely
- LHLewis Howes
... Asprey and all these other guys have them, and Sergey Young and all these people. And I'm like, ah, do I want this in my bod- Do you feel it a lot?
- 1:00:14 – 1:10:03
What he avoids and what he prioritizes: soda, sweeteners, meds, and fats (especially olive oil)
- LHLewis Howes
Yeah. So what would you say are the foods or the liquids that are off-limits for you? Or maybe that are, like, very rare that you'll consume something, whether it's a gingerbread. I'll, I'll drink this-
- DPDr. David Perlmutter
So we were watching Rick Steves on public television.
- LHLewis Howes
Uh-huh.
- DPDr. David Perlmutter
And it was obviously a couple years, uh, ago, 'cause no one was wearing masks. He was in Europe and, uh, he, they had ... It was for Christmas, and he ate gingerbread. And w- and it was, uh, we, my wife and I looked at him and we went-
- LHLewis Howes
We'll have to get some of that
- DPDr. David Perlmutter
... "We gotta get some gingerbread." [laughs]
- LHLewis Howes
[laughs]
- DPDr. David Perlmutter
So I s- I was able to, to, uh, find some. But, um, so that's ... So from time to time, having something that's sensible, that's not really, you know, killing it. But, uh, I think it's the high-fructose foods and the high-sugar foods. You know, understand that table sugar is 50% fructose.
- LHLewis Howes
Okay.
- DPDr. David Perlmutter
S- sucrose, this table sugar that is the ingredient, you know, that two s- uh, tablespoons of, of sugar along with the refined flour and some vanilla, and next thing you know, you've got dessert.
- LHLewis Howes
[laughs]
- DPDr. David Perlmutter
And somehow it, you know, it's alchemy. It creates something new, de novo, out of these ingredients. Pizza, the same way.
- LHLewis Howes
Yeah.
- DPDr. David Perlmutter
Somehow well, it's pizza. But no, it's made from flour, highly refined carb, uh, flour dough, refined flour, and then you put tomato sauce and the mushrooms. It's now not bad anymore. It's new thing. It's pizza, therefore it's good. But, um-
- LHLewis Howes
What's off limits for you then? What's like you don't have?
- DPDr. David Perlmutter
Well, one thing I, I don't ever eat is liver. Not, I'm not saying it's bad food, I just can't eat it.
- LHLewis Howes
Okay.
- DPDr. David Perlmutter
I hate it. Uh, off limits are soda.
- LHLewis Howes
Mm-hmm.
- DPDr. David Perlmutter
Uh, fructose containing, uh, sauces, uh, condiments, uh, fruit juice, that's for sure. Anything that's, that's got a lot of sugar is off the table.
- LHLewis Howes
Sweets, candy, and all that stuff.
- DPDr. David Perlmutter
No. Uh, that's not for me.
- LHLewis Howes
You don't eat it?
- DPDr. David Perlmutter
No.
- LHLewis Howes
It's completely out of your ...
- DPDr. David Perlmutter
No, I, I won't say completely. I might have a mint.
- LHLewis Howes
You might have... Okay.
- DPDr. David Perlmutter
In fact, uh, there was a ... And so I remember them. I had a mint, uh, that was in the, our rental car that the, uh, that Hertz put there for me. I ate that. But generally, that's not who I am. I don't eat, uh, I don't need it. And, um, do I feel guilty afterwards? Probably not. I, maybe I could feel more guilty-
- LHLewis Howes
After eating a mint, you mean, or what?
- DPDr. David Perlmutter
No, I don't. I don't feel guilty. I mean-
- 1:10:03 – 1:21:36
Uric acid and the ‘LOVE’ approach: measuring, targets, and levers (fructose, alcohol, purines)
- LHLewis Howes
And they probably don't wanna go to bed earlier to sleep so that they can burn more fat when they're sleeping, all these different things. So what is this surprising new science of uric acid? What is uric acid?
- DPDr. David Perlmutter
So we-
- LHLewis Howes
What do we need to know about it, and how do we use it to lose weight?
- DPDr. David Perlmutter
Uric acid is the downstream end metabolite of fructose.
- LHLewis Howes
What does that mean for somebody who's-
- DPDr. David Perlmutter
So it means when, when you eat fructose-
- LHLewis Howes
Yeah
- DPDr. David Perlmutter
... it goes into your body. It's absorbed through your intestinal lining. It undergoes a series of changes until it reaches uric acid, at which point that uric acid, some of it stays in the bloodstream, some of it is excreted.
- LHLewis Howes
So sugar turns into uric acid at some point.
- DPDr. David Perlmutter
Fructose turns into uric acid.
- LHLewis Howes
Fructose. What other ... Okay, it's not sugar.
- DPDr. David Perlmutter
Right. Well, fructose is sugar, but this is unique. Fructose and glucose are totally different. I, I would say apples and oranges. That's-
- LHLewis Howes
[laughs]
- DPDr. David Perlmutter
Although that's confusing.
- LHLewis Howes
Apples and, and candy bars, yeah. So what is f- where is fructose and where is glucose for those that aren't sure?
- DPDr. David Perlmutter
That's right. So fructose, the name comes from fruit sugar, fructose. Ose in, uh, biochemistry means, or in chemistry means sugar. And, uh, you know, this is what is found in fruit, and this was what allowed some of our ancestors to survive-
- LHLewis Howes
Okay. And then-
- DPDr. David Perlmutter
... who could eat fruit, uh, fruit in the late summer, early fall and had a little advantage that they would make more fat such that when food was unavailable, they would survive, and those who didn't make that little bit more fat-
- LHLewis Howes
Would perish, yeah
- DPDr. David Perlmutter
... would perish. And we didn't get their genes. We got the genes from the ones who survived.
- LHLewis Howes
Who could produce a little more fat.
- DPDr. David Perlmutter
A little bit more fat and became a little bit more insulin resistant so that their blood sugar would go up just a little bit, allowing their brains to, uh, help them avoid the two things that were their biggest threats, starvation and predation. Starvation, not having enough food. Predation, getting eaten.
- LHLewis Howes
Mm-hmm.
- DPDr. David Perlmutter
You know? Not ... Both of which are not really threats to most of us these days.
- LHLewis Howes
Right, right.
- DPDr. David Perlmutter
It's not like we're gonna be walking down the street and a lion's gonna come and-
- LHLewis Howes
No
- DPDr. David Perlmutter
... eat you.
- LHLewis Howes
No.
- DPDr. David Perlmutter
In which case you'd wanna have a smart, uh, be smart so you could do what you need to do to get away from the lion.
- 1:21:36 – 1:29:02
Closing questions: three truths, lessons learned, mission, and definition of greatness
- LHLewis Howes
I have a, a couple final questions for you.
- DPDr. David Perlmutter
Sure.
- LHLewis Howes
This is called the three truths. I ask everyone this question at the end of the interview, and it's a hypothetical scenario. So imagine it's many years away, but it's your last day, last day on Earth. And you get to choose the day. You get to live as long as you want, but eventually, you gotta turn the lights off for this world. Um, and you have accomplished every dream you could think of. You can l- you've lived the life that you want to. You have the relationships. You have the, you know, the accomplishments, the impact. It's all there. But for whatever reason, every piece of work or piece of content you've put out into the world has to go with you or go to another place. We don't have access to this information anymore. So this book, everything you've created, for whatever reason, it's gone. Again, hypothetical world. But you have a piece of paper and a pen, and you get to write down three things you know to be true about life, about your experiences, about what you've learned, that you would wanna share with the world, and this is all we would have to be reminded by your message. What would you say are those three truths for you?
- DPDr. David Perlmutter
Number one, uh, and I'm not gonna rank them, but number one that comes to mind is there is nothing constant except change.
- LHLewis Howes
Mm-hmm.
- DPDr. David Perlmutter
Uh, number two is the golden rule, do unto others as you would have them do unto you. And number three would be don't sweat the small stuff.
- LHLewis Howes
Yeah.
- DPDr. David Perlmutter
I remember who said that to me the very first time. I was a freshman in college. And oddly enough, his name was John Kennedy, not John Kennedy, but h- that was his name. And it was very meaningful. I didn't get it at first.
- LHLewis Howes
He said, "Don't sweat the small stuff."
- DPDr. David Perlmutter
But over the years, I've gotten it.
- LHLewis Howes
Right. Isn't the book, Don't Sweat the Small Stuff and It's All Small Stuff? Isn't that the-
- DPDr. David Perlmutter
Oh, uh, yeah, you're right
- LHLewis Howes
... I think that's the tagline. It's like-
- DPDr. David Perlmutter
But that's, uh ... It's not worth it.
- LHLewis Howes
Yeah.
- DPDr. David Perlmutter
It isn't worth it.
- LHLewis Howes
What do you wish you'd have learned and implemented 30 years ago for yourself that maybe you didn't implement yet, but now you know?
- DPDr. David Perlmutter
Well, now m- uh, uh, from a, a practical point of s- uh, view, I would've said, uh, don't get as much sun.
- LHLewis Howes
Really?
- DPDr. David Perlmutter
Oh, man, I really overdid it and paying the price now. Number two, floss more re- regularly.
- LHLewis Howes
Yeah.
- DPDr. David Perlmutter
Number three, uh, I would say don't sweat the small stuff.
- LHLewis Howes
Yeah. Interesting.
- DPDr. David Perlmutter
'Cause it took a, it took a while to learn that. I mean-
- LHLewis Howes
Yeah
- DPDr. David Perlmutter
... um-
- LHLewis Howes
Obsessing over every little thing that was like-
- DPDr. David Perlmutter
I'm, I'm, I know I'm a driven individual.
- LHLewis Howes
Yeah.
- DPDr. David Perlmutter
I, I know that.
Episode duration: 1:29:02
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Transcript of episode _GiEkp2tohc