Soy is a source of vegetable protein, which is an important part of a balanced diet. It is derived from the soybean plant, which is native to East Asia and is now grown in many parts of the world. Soybeans are high in protein, fiber, and essential vitamins and minerals, making them a nutritious and versatile food. SOY products such as tofu, tempeh, and edamame are popular sources of vegetable protein, and can be used in a variety of dishes.