A study in the Journal of the American Medical Association found that participants who followed a low-carbohydrate diet burned 300 calories more daily than did those on a low-fat diet, but they also showed higher levels of cortisol and an inflammation marker, potentially increasing their risk of heart disease and diabetes. Participants on the low-fat diet fared worst on energy expenditure and had increased triglyceride levels, researchers said. However, a low-glycemic-index diet helped participants burn 150 additional calories daily and did not show adverse effects on cholesterol and hormones, researchers added.
JAMA study compares effects of 3 diets
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