Thecreatine is a non-essential dietary amino acid, found primarily in meat, poultry and fish. Creatine supplements can help increase the phosphocreatine content in skeletal muscle. Creatine helps improve the ratio of muscle mass to body fat more muscle, less fat when training. It also helps improve physical performance as well as neurological disorders linked to creatine deficiency. Professionals also use it to treat heart failure, reduce the symptoms of certain muscle pathologies and decrease glucose levels in diabetes.abète.