20 G Protein 0 G Carbs NOW Sports Soy Protein Isolate is a good vegetable source of high quality complete protein that has an excellent amino acid profile. Soy products, including soy protein, have naturally occurring phytoestrogens and beneficial proteins such as genistein and daidzein. Make sure you’re getting the basic building blocks of good health with high quality NOW Sports Soy Protein Isolate.