Protein foods, one category is milk, animal meat, poultry, eggs, fish, shrimp and other animal proteins; the other category is soybeans, green beans and black beans and other beans, sesame seeds, melon seeds, walnuts, almonds, pine nuts and other dried fruits such as plant proteins.

Because animal proteins contain a variety of amino acids and the proportion of human needs, so animal proteins than plant proteins of high nutritional value. The body's need for protein depends not only on the content of protein, but also on the type and proportion of essential amino acids contained in protein.

Extended information:

In the plant food, rice and flour protein lacks lysine, and bean protein lacks methionine. Although human milk, cow's milk, eggs in the protein content is low, but they contain the amount of essential amino acids basically consistent with the human body, so the nutritional value is higher.

Baidu Encyclopedia - High-Protein Foods