Tofu is a vegetable protein derived from soybeans. The beans are soaked, boiled and ground to a liquid state. With the help of a coagulant, the liquid thickens, turning into tofu. Tofu does not contain dairy products, gluten, cholesterol, so it is popular among people who adhere to a specialized diet. Often used as a meat substitute, tofu is high in protein but low in fat, sodium and carbohydrates.