Tofu is a soybean-based food that originated in China and is also common in Vietnam, Japan and the Korean Peninsula.

Old tofu, is a highly nutritious food made from soy protein. The human body to its absorption rate of up to ninety-two to ninety-eight percent, tofu brain in addition to the amount of protein, but also for the body's physiological activities to provide a number of types of vitamins and mineral amount. Especially with gypsum as a coagulant, not only to produce more finished products, and contains calcium, to meet the body's need for calcium, to prevent chondropathy and dental dysplasia and other diseases have a certain effect.