What is the main body of China's traditional diet and the main source of human energy?

Grain is the main body of China's traditional diet and the main source of human energy. Grain is the sum of flour, rice, corn flour, wheat and sorghum. Mainly provide carbohydrates, protein, dietary fiber and B vitamins.

Cereal is a kind of food crop, which contains 8%-40% protein. Soybean contains protein 40%, rice 8%, highland barley 13.4% and oat 15.6%. The fat content in grain is about 20%, which is concentrated in grain, chaff or germ. Soybean seeds and wheat germ contain a lot of oil, and unsaturated fatty acids account for more than 80%.

Cereals also contain vitamin E and B vitamins. The inorganic salt content of grain is about 1.5%-3%, half of which is phosphorus. In order to improve the nutritional value of cereals, it is best to adopt the method of mixed eating of all kinds of cereals, that is, mixed eating of coarse and coarse cereals and miscellaneous grains. Through the complementary action of foods, the types and quantities of protein amino acids in foods are closer to the physiological needs of human bodies.