Soy is a source of vegan protein, derived from the soybean plant. It is a legume that is high in protein and contains all nine essential amino acids. SOY is a versatile ingredient that can be used in many dishes, from tofu to tempeh to edamame. It is also used to make milk, cheese, and other dairy-free products. SOY is a popular choice for vegans and vegetarians looking for an alternative source of protein.