Soybeans are a type of legume native to eastern Asia. They are an important component of Asian diets and have been consumed for thousands of years. Today, they are mainly grown in Asia and South and North America. In Asia, soybeans are often eaten whole, but heavily processed soy products are much more common in Western countries. Various soy products are available, including soy flour, soy protein, tofu, soy milk, soy sauce, and soybean oil. Soybeans contain antioxidants and phytonutrients.