Coarse grains contain a variety of nutrients conducive to good health, such as vitamins, dietary fiber, etc. Eating appropriate coarse grains can provide the body with essential nutrients. Coarse grains mainly refers to whole grains and legumes, such as corn, millet, sweet potatoes, oats, buckwheat, soybeans, red beans, etc. Coarse grains relative to fine grains such as fine white rice and noodles, contains more vegetable protein, and vitamins and minerals are richer, and in addition contains a large amount of dietary fiber. For normal healthy people, usually staple food with coarse grains and fine grains to eat together, can add more nutrients, and can promote gastrointestinal peristalsis, prevention of constipation, coarse and fine mixed with eating, satiety is also stronger, is conducive to weight control, prevention of obesity. Although coarse grains are nutritious, it is recommended not to eat too much, for some of their own digestive function is not good for the crowd to eat as little as possible, so as not to cause indigestion, flatulence and so on.