Carbohydrates with special polymer structure contained in grains can release energy slowly and permanently in the body. At the same time, the water-soluble fiber contained in it can suck cholesterol out of the body like a sponge, take it out of the body and reduce cholesterol. Insoluble fiber in oatmeal can increase gastrointestinal peristalsis and excrete waste. Therefore, making cereal with milk for breakfast or at night will not gain weight.