... meal. Soybeans are processed into three kinds of proteins: soy flour, concentrates, and isolates, which are the starting materials for soy ... is about 70% soy protein and is basically defatted soy flour without the water soluble carbohydrates. It is made by ... fat).Soy protein concentrates are available in different forms: granules, flour and spray-dried. Because they are very digestible, they are ...