Creatine monohydrate, 5g per serving, and nothing else in the tub. There is no proprietary blend here because there is nothing to blend — monohydrate is the form nearly every study used, and the newer forms sold at four times the price are mostly a marketing answer to a problem monohydrate does not have. We are not going to tell you what it will do for you. We will tell you exactly what is in the scoop.