The 10 Best Foods for Flat Abs

Yogurt and Veggie Soup

People who get their calcium from yogurt rather than from other sources may lose more weight around their midsection, according to a recent study published in the International Journal of Obesity. The probiotic bacteria in most yogurts help keep your digestive system healthy, which translates into a lower incidence of gas, bloating, and constipation, which can keep your tummy looking flat.

Try for: One to three cups a day of low-fat or fat-free yogurt. Choose unsweetened yogurt that contains live active cultures. Add a handful of fresh chopped fruit for flavor and extra fiber.

Researchers at Pennsylvania State University found that people who ate broth-based (or low-fat cream-based) soups two times a day were more successful in losing weight than those who ate the same amount of calories in snack food. Soup eaters also maintained, on average, a total weight loss of 16 pounds after one year. "Plus, it's a simple way to get your vegetables," says Susan Kleiner, PhD, RD, author of Power Eating (Human Kinetics, 2001).

Try for: At least one cup of low-calorie, low-sodium vegetable soup every day.