Dr. Robert Lustig
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Podcast Appearances
Not only do you not need it... But in high dose, it's toxic. Now, your liver has the innate ability to metabolize a small amount, on the order of about six to nine teaspoons per day. Of dietary sugar, so half of that being fructose. So about 12 grams. Your liver can manage about 12 grams of fructose a day.
Not only do you not need it... But in high dose, it's toxic. Now, your liver has the innate ability to metabolize a small amount, on the order of about six to nine teaspoons per day. Of dietary sugar, so half of that being fructose. So about 12 grams. Your liver can manage about 12 grams of fructose a day.
In the same way it can manage about 12 grams of alcohol per day without showing any signs of any metabolic derangement. But if you go above that, now you get problems.
In the same way it can manage about 12 grams of alcohol per day without showing any signs of any metabolic derangement. But if you go above that, now you get problems.
We are so above that. We are at 50 grams of fructose per day, 100 grams of sugar per day. We're supposed to be at 25. We are at 100. We are quadruple our limit.
We are so above that. We are at 50 grams of fructose per day, 100 grams of sugar per day. We're supposed to be at 25. We are at 100. We are quadruple our limit.
Okay.
Okay.
Because it's hidden in all of the food. That's exactly right. We don't even know. We say, oh, I never even add sugar to my coffee. Therefore, my sugar consumption is zero. Wrong. That is not true. Okay. Because it is hidden in plain sight in virtually every processed food in the entire grocery store. 72%.
Because it's hidden in all of the food. That's exactly right. We don't even know. We say, oh, I never even add sugar to my coffee. Therefore, my sugar consumption is zero. Wrong. That is not true. Okay. Because it is hidden in plain sight in virtually every processed food in the entire grocery store. 72%.
3% of all of the items in the American grocery store and in the British grocery store are spiked with added sugar by the food industry for its purposes, not for yours. Because they know when they add it, you buy more. And how much does that look like in teaspoons then? The upper limit is about six teaspoons of added sugar per day. The allowance, the recommended allowance. The upper limit. Okay.
3% of all of the items in the American grocery store and in the British grocery store are spiked with added sugar by the food industry for its purposes, not for yours. Because they know when they add it, you buy more. And how much does that look like in teaspoons then? The upper limit is about six teaspoons of added sugar per day. The allowance, the recommended allowance. The upper limit. Okay.
The recommended allowance is lower than that. Yeah. Okay, but the upper limit is about 16 spoons of added sugar per day. So we have an innate capacity to metabolize about 12 grams of fructose per day. By the way, that's for adults. For children, it's one third of that, four grams of fructose per day. Okay, four to six. So we're talking very little, talking very little.
The recommended allowance is lower than that. Yeah. Okay, but the upper limit is about 16 spoons of added sugar per day. So we have an innate capacity to metabolize about 12 grams of fructose per day. By the way, that's for adults. For children, it's one third of that, four grams of fructose per day. Okay, four to six. So we're talking very little, talking very little.
But when you think about, for instance, kid in America, you know, 29% of kids in America consume the National School Breakfast Program breakfast in school. Okay, 29%. So what is... the National School Breakfast Program breakfast. It's a bowl of Froot Loops and a glass of orange juice. That is 41 grams of sugar. The upper limit for children in terms of their metabolism is 12 grams per day.
But when you think about, for instance, kid in America, you know, 29% of kids in America consume the National School Breakfast Program breakfast in school. Okay, 29%. So what is... the National School Breakfast Program breakfast. It's a bowl of Froot Loops and a glass of orange juice. That is 41 grams of sugar. The upper limit for children in terms of their metabolism is 12 grams per day.
They got 41 grams and it's just breakfast. What do you think that's going to do? Now, if a calorie were a calorie, and if glucose and fructose were the same, then you say, well, you got to get your calorie somewhere. But because fructose is not glucose, because fructose is more like alcohol, because fructose's toxicity has nothing to do with its calories, That is a huge overdose.
They got 41 grams and it's just breakfast. What do you think that's going to do? Now, if a calorie were a calorie, and if glucose and fructose were the same, then you say, well, you got to get your calorie somewhere. But because fructose is not glucose, because fructose is more like alcohol, because fructose's toxicity has nothing to do with its calories, That is a huge overdose.
And it has metabolic complications, it has systemic health complications, it has mental health complications.
And it has metabolic complications, it has systemic health complications, it has mental health complications.