Protein-rich foods are mainly meat, eggs, milk, meat has beef, mutton, pork, and chicken, duck, goose, eggs have eggs, duck eggs, quail eggs, milk to milk, goat’s milk is the main. There are also soybean products, soybean products are mainly soybeans, and soybean products have the highest protein content, which can reach 30%-40%. All protein sources of food animal protein is more easily digested and absorbed by the body, while plant-based proteins such as starchy foods, staple foods contain protein, and soy products contain protein, are incomplete protein, need to be fully digested and absorbed through the complementary role of protein.