You may have heard about soy foods in the news, including claims that soy prevents diseases such as cancer and heart disease. So what's the story on soy?
Soy, a versatile bean, is found in foods like soy milk, soy sauce, miso (soybean paste), tempeh (which is kind of like a soy cake), and tofu. Soy is also sometimes added to foods like breads, cereals, and meat products, and used as a meat substitute in vegetarian products such as soy burgers and soy hot dogs.
Foods that contain whole soy are a good source of protein for vegetarians and vegans because they provide all the amino acids — a type of nutrient — that people need to stay healthy. (People who eat meat get all their essential amino acids from animal products.)
(info from kidshealth.org)