Creatine is one of the most popular and most essential supplements in a sportsperson’s diet. The body makes use of it to synthesise ATP, a high-energy compound which acts as fuel for the muscles. GO ON Nutrition Creatine is a dietary supplement containing pure creatine monohydrate in the form of a powder. It improves physical performance during short, repetitive bursts of intense physical activity (when used in doses of at least 3g/daily). Creatine is one of the most popularly used supplements among people who regularly experience extreme exertion.