Your Toughest Diet Dilemmas Solved

Low Carb vs. Low Fat

Neither. "Weight loss is all about calories," says Young. Cutting way back on carbohydrates could backfire: Your body needs carbs for energy, and by eliminating them from your diet, you also reduce your intake of filling fiber, which means you'll be hungry all of the time. As for fat, a little bit goes a long way toward helping you stay satisfied. To shed pounds, eat a reduced-calorie, balanced diet, and be selective about your foods. For example, when choosing carbs, opt for whole-grain varieties; for fats, go for heart-healthy sources such as olive oil, avocado, and nuts.