Creatine is a non-protein amino acid that is stored mostly within our muscle cells in the form mostly of phosphocreatine and aid in energy production. We consume creatine from foods especially meats and fish. However, we cannot concentrate our muscles with creatine using diet alone because uncooked beef or salmon can provide around 1-2g of creatine which is probably not easily attainable by many individuals to have this amount and might even need more (depending on individual’s muscle mass). If you are looking to build more muscles you will need to concentrate your muscles with creatine.