Soybean is high in protein. and is an important human food because they are unusually complete in proteins: 8 essential amino acids which are building blocks of protein and soybeans contain 7 in sufficient quantity and are deficient only in methionine, which can be supplied from wheat or corn. Soybean flour is two times as rich in protein as wheat flour
Popularity of soybeans in China and other eastern Asian countries was due to their wide use as a food.
Tofu is made from coagulated soybean milk, has become well known to western eaters of East Asian cuisines.
Soybeans are eaten in different ways: as green or dried bean and can be made into soy milk, curds, cheese, and various sauces and are major source of vegetable oil. Soybean protein is increasingly used as a meat imitation or substitute.