Not long ago, high-protein bars were the space food of choice for dieters who wanted their sweet fixes in alternative form. But with diets such as Atkins and the Zone reinforcing the idea that carbohydrates are the main stumbling block to weight management, low-carb bars are crowding the racks near the registers at supermarkets, pharmacies and health-food stores. "They're so popular because people think, I'll have this instead of a candy bar," says Sharron Dalton, professor of nutrition at New York University. But experts warn that just because these bars are low in "net carbs"--the kind that affect blood sugar and...
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