Main Properties: Soy extracts exhibit hormonal activity due to their content of isoflavones (daidzein, genistein, and their associated glycosides). Their antitumor activity, prevention of osteoporosis, arthritis, and effects on carbohydrate and lipid metabolism are under study. They are highly nutritious (proteins 35–50%, carbohydrates 15–35%, lipids, phospholipids, sterols, enzymes, vitamins, etc.).