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The largest-ever controlled study of popular weight-loss plans has weighed in with a surprising conclusion: It doesn't really matter what combination of protein, carbohydrates or fat you consume, at least not on the bathroom scale, as long as you cut calories. More than 800 overweight or obese adults were assigned to one of four diets, loosely based on such popular plans as the Atkins or Ornish diets. Each group cut calorie intake by about 750 calories. After six months, all four groups averaged a loss of 13 pounds; after two years, participants had kept off about 9 pounds and reduced two inches in waist size, regardless of diet plan. "There's no special diet that's better for weight loss than any other," researchers concluded.-New England Journal of Medicine
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