Creatine Monohydrate is formed in the human body from the amino acids arginine, glycine and methionine. Certain foods such as beef and oily fish contain creatine monohydrate, however the quantities a person would have to digest for the desired amounts would not be practical.
In short duration explosive sports such as sprinting, weight lifting and rugby, creatine phosphate is used to produce more energy. Supplementing with creatine monohydrate increases your body’s pool of creatine, allowing more ATP (energy) to be formed. This means more work done in a training session i.e. weight training or repeated sprints.