كتاب weighing the diet books

Y ■ Rice ranges from high-GI (instant white) to low-GI (Uncle Ben’s converted white), with brown and longgrain white rice in the middle. “Are we going to specify for the public which kind of rice they should eat and which kind they shouldn’t?” asks Pi-Sunyer. ■ Sugars range from high-GI (glucose) to low-GI (fructose). Sucrose (table sugar) is smack in the middle. What’s more, “researchers have found no relation between the sugar content of foods and their glycemic index,” says Pi-Sunyer. And it’s not even clear that the rise in blood sugar that comes from eating high-GI foods leads to high blood insulin levels, or that higher insulin leads people to overeat, says Pi-Sunyer.1 “The glycemic index may account for less than a quarter of the insulin response to a food,” he suggests. “And there is no evidence that the typical post-meal levels of insulin increase food intake or body weight.” Which leads to the question: how good is the evidence that low-glycemicindex foods promote weight loss? N o M a g i c B u l l e t You’ll find a glycemic-index ranking of foods in The Zone; Dr. Atkins; Good Carbs, Bad Carbs; and The New Glucose Revolution. But unlike the other books, The New Glucose Revolution was written by scientists who have actually studied the glycemic index. In fact, one of its authors, Thomas Wolever of the University of Toronto, was one of the researchers who helped devise the scale. The glycemic index is no magic bullet for dieters, says Wolever. “I’ve yet to see evidence that a low- GI diet aids weight loss,” he explains. “One or two studies show it and a number of others don’t.” Despite the “Lose Weight” claim on the cover of Wolever’s The New Glucose Revolution, “it’s not really a diet book,” he says. “It’s information about the glycemic index and how to use it for health.” Wolever’s research uses a lowglycemic- index diet to lower the risk of heart disease and to control diabetes. “The chapter on weight says that a low-GI diet may be helpful for people the Atkins’ low-evidence revolution
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من الدايت واللياقة البدنية الدايت باللغة العربية - مكتبة كتب اللياقة البدنية والصحة العامة.