Protein can form and repair tissues. Every cell in the whole body is composed of protein, and a certain amount of protein is decomposed and excreted every day, so it is necessary to take the corresponding protein to make up for the consumption of old tissues.

(2) protein is the basic raw material of various enzymes, hormones and many important substances in the human body, so protein has a regulatory function.

(3) protein provides the body with resistance. Because antibodies are made up of protein, protein is a nutrient for the body to produce resistance.

(4) protein can provide heat energy. 1 g protein can generate 4 kilocalories.