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Aitor Calero García

Why existing efforts to combat childhood obesity are bound to fail. By Gary Taubes | hi... - 0 views

  • For the last 60 years, physicians and public-health authorities have been giving that exact same advice to obese people—children and adults—with little or no success
  • The subjects experience modest weight loss (maybe nine or 10 pounds in the first six months), and then they gain the weight right back. Weight loss doesn't last
  • The researchers enrolled nearly 50,000 mostly overweight or obese women into the trial, chose roughly 20,000 of them at random, and instructed that group to eat a low-fat diet, rich in fruits, vegetables, and fiber. These women were given regular counseling to motivate them to stay on the diet. If we believe what these women said they were eating, they also cut their average energy intake by well more than 300 calories a day
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  • After seven-plus years on the diet, these women lost an average of one pound each6 (PDF). And their average waist circumference—a measure of what the diet-book authors like to call "belly fat"—increased
  • whatever weight these women lost was not fat but lean tissue—muscle
  • Prior to the 1960s, clinicians used to argue that making an obese person exercise would just make them hungry—they'd work up an appetite—and that's the last thing you want for someone who needs to lose weight.
  • but it certainly speaks to the idea that getting kids to move more is not the answer
  • Making it possible for children to enjoy the benefits of physical activity is a wonderful thing, but expecting that they'll lose weight by doing so is naive
  • how the human body regulates fat metabolism and the accumulation of fat in our adipose tissue
  • why we accumulate fat—or more specifically, why our fat cells store more calories as fat than they release into the circulation to be burned for fuel
  • Insulin levels, for all intents and purposes, are controlled by the carbohydrates in the diet. The more refined and easily digestible those carbohydrates (the higher the glycemic index, as nutritionists would say), the more insulin will be secreted. And the sugars we consume—i.e., sucrose, the stuff we put in our coffee, as well as high-fructose corn syrup—will cause long-term increases in insulin production
  • Every woman knows carbohydrate is fattening: this is a piece of common knowledge, which few nutritionists would dispute
  • We have to tell children (and their parents) that carbohydrate-rich foods—especially sugars and liquid sugars, like fruit juice and soda—are literally fattening.
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    For the last 60 years, physicians and public-health authorities have been giving that exact same advice to obese people-children and adults-with little or no success
Aitor Calero García

Fructose - Wikipedia, the free encyclopedia - 0 views

  • produced significantly higher fasting plasma triacylglycerol values than did the glucose diet in men
  • This may be an important contribution to senescence and many age-related chronic diseases
  • When fructose reaches the liver," says Dr. William J. Whelan, a biochemist at the University of Miami School of Medicine, "the liver goes bananas and stops everything else to metabolize the fructose." Eating fructose instead of glucose results in lower circulating insulin and leptin levels, and higher ghrelin levels after the meal.[59] Since leptin and insulin decrease appetite and ghrelin increases appetite, some researchers suspect that eating large amounts of fructose increases the likelihood of weight gain
Aitor Calero García

What makes fructose fattening? Some answers found in the brain - 0 views

  • the brain's response to fructose is very different to the response to glucose, which is less likely to promote weight gain
  • This study provides evidence in humans that fructose and glucose elicits opposite responses in the brain. It supports the animal research that shows similar findings and links fructose with obesity
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