More calcium seems to help women lose visceral fat. Look for it in leafy greens, dairy, and fatty fish like sardines. Trans fats and fructose-sweetened foods, on the other hand, seem to encourage belly fat. Read the nutrition label, and try to avoid the bad stuff. And eat a variety of vegetables, fruits, whole grains like oatmeal and quinoa, and lean protein like skinless chicken, fish, eggs, beans, and low-fat dairy.