Genisoy's Ultra-XT Soy Protein Shakes and Powder formulas use only natural soy protein with a guaranteed isoflavone level of 3.4mg per gram of protein. The isoflavone content of soybeans can vary from one harvest to another, so Ultra-XT contains only water processed isolated soy protein with naturally occurring (not boosted or enhanced) levels of isoflavones. Genisoy Ultra-XT formulas are also high in fiber and an excellent source of calcium. Each serving provides 500mg of calcium. When mixed with fruits and other liquids or juice, Ultra-XT becomes a never ending variety of shakes and smoothies.