Creatine is an amino acid, like the building blocks that make up proteins. Creatine in the form of phosphocreatine (creatine phosphate) is an important store of energy in muscle cells. Creatine is often taken by athletes as a supplement for those wishing to gain muscle mass (bodybuilding) and strength. A number of methods for ingestion exist – as a powder mixed into a drink, or as a capsule or caplet . The following Creatines are some of the best on the market, it is suggested that you check with your health care profession regarding its use.