Yes, whole grains are high in cellulose and difficult to digest. Eating them can easily make people feel bloated, and it is conducive to defecation, so that people can excrete toxins and oils. However, you should also choose to eat them. For example, sweet potato has a high sugar content, which will make you fat if you eat too much, and corn has a high vitamin E, which can make you beautiful if you eat too much. Red beans have diuretic and detumescence effects, while mung beans have lipid-lowering and fire-reducing effects.