It is important to select foods with a low glycemic index, as opposed to those with a high glycemic index.

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Weight Loss: Diets with high protein content and a low glycemic index may improve overweight people's ability to maintain weight loss, according to a study in the New England Journal of Medicine.

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Those on the low-glycemic-index diet burned about 150 calories a day more than those on the low-fat diet without any negative impacts on cholesterol levels or various hormones, making it the ideal diet, Dr. Ludwig said.

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