Sugar is essential for our diet and an important source of energy in our body. If you want to reduce stomach fat, you have to be careful of where you get it and the amount you consume. Fruits containing natural sugar are much healthier than refined sugar. They are rich in antioxidants, fiber, vitamins, and minerals. However, fruits that are high in sugar can also cause stomach fat. Here is a list which highlights fruits that are high in sugar, as well as fruits that contain low or medium levels of sugar.