If you're battling against the bulge, listen up: A new study has found that calories, not the types of food you eat, determine how much weight you lose.

The U.S. Department of Agriculture-Tufts University study shows that after a year, overweight people on a low-carb low-glycemic-index diet lost just as much weight — 8% of their original weight — as people on a reduced-fat, high-glycemic-index diet, according to a CBS News/Web MD report.

The findings appear in the April issue of the American Journal of Clinical Nutrition.

-- Amanda Barrett, amNY.com