Cereals provide a certain amount of protein and minerals, vitamins, etc., and are rich in carbohydrate compounds and a small amount of fat. Cereals mainly include cereal and legume crops, represented by rice, wheat, corn, soybeans, mung beans, etc. Such crops are usually used as the daily staple food of our people and are one of the main sources of energy for daily life. At the same time for the body to replenish protein, vitamins and sodium, potassium, phosphorus, calcium and other minerals, is also the main source of vitamin B. Take grain wheat as an example, about every 100g of wheat can provide the body with 339kcal of energy, 11.9g of protein, 325mg of phosphorus, 289mg of potassium, 2.3g of vitamins (including vitamins B and E), 1.3g of fat and so on. It should be noted that in refined grains, such as refined rice, some nutrients, especially protein and vitamin B, are lost due to processes such as peeling. Therefore, in the absence of special requirements for staple foods, it is recommended to observe the principle of diversification and consume a combination of grains and cereals.