Change Your Brain Every Day - The Surprising Reason People are Overweight with Dr. Robert Lustig

Episode Date: September 16, 2019

In Robert Lustig’s early work as a pediatric endocrinologist, he began studying the effect certain molecules had on the body’s organs. What he found was a stunning connection between fructose and liver function, which helps explain the reason for today’s obesity epidemic. In the first episode of a series with the author of “Fat Chance,” Dr. Daniel Amen and Lustig discuss how and why fructose is making people fat.

Welcome to the Brain Warriors Way podcast. I'm Dr. Daniel Amen. And I'm Tana Amen. In our podcast, we provide you with the tools you need to become a warrior for the health of your brain and body. The Brain Warriors Way podcast is brought to you by Amen Clinics, where we have been transforming lives for 30 years using tools like brain spec imaging to personalize treatment to your brain. For more information, visit amenclinics.com. The Brain Warriors Way podcast is also brought to you by BrainMD, where we produce the highest quality nutraceuticals to support the health of your brain and body. To learn more, go to brainmd.com. Welcome everybody.

I am so excited for this week and maybe we'll call it the bitter truth week. I am here with my new friend, Rob Lustig, who is a professor of pediatrics in the division of endocrinology at UC San Francisco. He is also the chief science officer at Eat Real, a non-profit dedicated to reversing childhood obesity and type 2 diabetes. Dr. Lustusted consults several childhood obesity advocacy groups and government agencies his books which are just amazing include the new york times bestseller fat chance the fat chance cookbook and sugar has 56 names a shopper's guide. And his new book is called The Hacking of the American Mind, which is really interesting because I actually submitted a proposal for a book called Flying Blind and the Raping of the American Mind.

But then I thought, okay, that's a little over the top. Raping, hacking, you know, it's all the same. So how – we actually just met a few weeks ago. Yeah, yeah. And I've known about you for a while. And I take it you have known about me for a while. So it was good that we finally actually laid eyes on each other. Yeah.

Well, it's so funny because you're in line for talking to me. And I see you and I immediately recognize you from the YouTube talk, Sugar, The Bitter Truth. If you haven't watched that, and it's more than an hour, but it's fascinating. It's just literally, it'll change your life. I watched that 10 years ago when it first came out, and now it has like 8 million views or more. And it just changed how I thought about sugar and about fruit juice in particular. So in this podcast, so this week, we're going to talk a lot about sugar and society and what Rob has learned. But I want you to tell our listeners and our viewers who you are and why you do what you do. I'm a pediatric endocrinologist.

I study hormone problems in children. I started out being interested in why boys were boys and girls were girls from the neck up. I am a neuroendocrinologist. So I was studying how the brain controls hormones how hormones control the brain how testosterone causes differences in you know brain formation and development and you know what that meant for individuals and for you know various disease states that's what I started doing and couldn't get funded for it well I was also interested in obesity and I had this one idea back in the early to mid-90s about whether or not the insulin played a role in weight gain.

Now, up to that point, people had thought, well, yes, insulin levels are high in the obese, but it's a result of the weight rather than a cause. Well, there is a disorder in neuroendocrinology, which you may or may not have heard of, called hypothalamic obesity. So these are kids who had brain tumors, and because of the tumor, their hypothalamus is shot. Their hypothalamus is either dead from the surgery or from the tumor itself or from the radiation, and they become massively obese. Now, it was around the mid-'90s

when we had discovered this hormone called leptin. It was about 1994. And I postulated back then that these kids, because of the brain damage, couldn't see their leptin. And because they couldn't see it, their brain thought they were starving. So you can't fix a brain, or actually, I take it back, you can. That's what we do. Okay. But back then we couldn't do such a good job. Right. And we didn't think about it. Basically, these kids had anatomic damage to their brain, in particular, the limbic system. So what could we do for them? So based on some old work

in animals, it would have appeared that getting the insulin down by cutting the vagus nerve, and there's a connection between the hypothalamus and the pancreas via the vagus nerve, cutting the vagus nerve reduces the amount of insulin that the pancreas releases and reduces the amount of weight gain in lesioned animals. So, well, I can't cut a vagus nerve. I'm not a surgeon. So I said, well, can we do the next best thing? Can we give a drug that would stop the pancreas from making so much insulin?

So we did that. We did a pilot study where we gave a drug called octreotide, which is usually used to suppress growth hormone secretion from growth hormone secreting tumors of the brain, of the pituitary acromegaly or gigantism. But we instead used it to suppress insulin release at the level of the pancreas. And lo and behold, these patients started losing weight. Wow.

And no one had ever described weight loss in any of these patients before, but they lost significant amounts of weight. And something even more remarkable occurred that was basically spurred the rest of my career. Not only did they lose weight, but they started exercising spontaneously. Wow.

These were kids who sat on the couch, ate Doritos and slept. And the reason was because their brains thought they were starving. So they didn't want to expend any energy. But when we got their insulin down with the medicine, now they had energy to burn. And so they actually changed their lifestyle. So what this proved, and we did it again in a double-blind placebo-controlled trial, we also did it in adults who didn't have brain tumors and found the same phenomenon in a proportion of them. What this proved was that the biochemistry drives the behavior. And this shouldn't be too much of a shock, especially to you.

I mean, every thought is a protein phosphorylation. Everything that goes on in our brain is driven by biochemistry, by molecules. Your whole clinic is set up to fix those molecules. Fix the hardware before you fix the software. It's really hard to program a brain that doesn't work right. Exactly. So that's what we did. We fixed the problem where the problem was. We fixed the cause rather than the result. And I have basically taken that on going forward in all of my work, knowing that ultimately, sometimes we're smart enough to be able to figure out the cause. Sometimes we're not.

But it's always upstream of where you think it is. What we're looking at is the result of a problem rather than the cause of the problem. And you have to treat the cause if you're going to be successful. So besides a tumor, why do people have high insulin levels? Right. So that's the big question. Okay. So tumors, I mean, that's like one in a million. Everyone's hyperinsulinemic today. Everyone's insulin level is two to four times higher than it used to be. Now our glucoses are the same, but the amount of insulin that our bodies need to release to keep that glucose the same is two to four fold higher than it was in 1970. And that's where the work that I

delineate in Fat Chance really came from. And basically, I think it's sugar, the dietary sugar, the sweet stuff. And there's a reason for why I think that. Number one, it's gone up like crazy. Number two, the molecule in sugar that makes it sweet called fructose. So sugar is two molecules, glucose and fructose. Glucose is the energy of life. That's what's in starch. That's not what we're talking about. We're talking about fructose. Turns out fructose has a very specific biochemical profile. When you consume fructose, say a 20 ounce Coca-Cola, that fructose is all ending up in the liver. The liver cannot handle the load and the liver has no choice but to take that excess fructose and turn it into liver fat. And it is that liver fat

that is mucking up the workings of the liver and is causing that insulin resistance causing the pancreas to have to make more insulin to make the liver do its job driving the weight gain and we have now done several studies to prove that so when you get the fructose out of the diet in other words you cut the sugar from the diet the liver fat fat goes away, the pancreas makes less insulin, and the patient loses weight naturally. And the leptin starts working because the insulin was blocking the leptin. So basically, we can reverse metabolic syndrome just by getting sugar out of the diet. So we think sugar is a primary, not the only,

but a primary driver of the chronic disease epidemic that we see around the world today. And we are doing our best to try to stem the tide. How can people learn more about your work? So they can get the hacking of the American mind but if i mean i want you i mean because it's just life-changing to go to youtube and just search for the bitter truth sugar the bitter truth with robert lustig and i want you to get your kids to watch it's it's and and it's actually fairly detailed science yeah but you make it easy to understand because you're really masterful teacher thank you um how else can they learn about your work so um i what i would argue is number one that uh video is now 10 years old we have more

out that's more recent that i think is actually more up to date and better. If you do just a YouTube look on my name, you'll find a whole bunch of them. One's called Fat Chance Fructose 2.0, which I actually think is better, although not as many hits. There's a TED Talk I did called Sugar the Elephant in the Kitchen. Actually, what I would propose that people do is they take three hours of their time and they watch two movies and they're both on Netflix. One is called Fed Up, which was produced in 2014. And it's a documentary that tells the story of how we got to where we are today. And the other is called Sugar Coated, which is a documentary also on Netflix, which tells the story of why we got to where we are today.

That is the corporate subterfuge, the fraud, the public relations campaign to exonerate sugar and make us all sick. So when we come back, we're going to talk about sugar and the bitter truth. Stay with us. If you're enjoying the Brain Warriors Way podcast, please don't forget to subscribe so you'll always know when there's a new episode. And while you're at it, feel free to give us a review or five-star rating

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