... meal. Soybeans are processed into three kinds of proteins: soy flour, concentrates, and isolates, which are the starting materials ... the carbohydrates (soluble sugars) from dehulled and defatted soybeans.Soy protein concentrate retains most of the fiber of the ... and to improve nutritional values (more protein, less fat).Soy protein concentrates are available in different forms: granules, flour ...