100% Soy Protein Isolate by SciFit is made with only SuPro brand soy protein. Supro Soy Protein Isolate is aspartame free, cholesterol free, ranks #1 in protein digestibility, naturally contains Lecithin, contains all of the essential amino acids our bodies require for optimal function, and contains the most bioactive component of soy protein...Isoflavones. Isoflavones are currently being intensely researched as to the possible positive effects on heart disease, menopausal symptoms, osteoporosis, and breast and prostate cancers.