Creatine is actually present in everyones body in the form of creatine phosphate (CP). It is an "energy replenishing" chemical that is produced by the liver. The average person has about 120 grams of creatine phosphate in their body at any given time. Creatine is also found in beef and multiple species of fatty fish. Unfortunately these foods do not supply anywhere near the amount of creatine required to enhance performance and build muscle. This is why creatine needs to be consumed in supplementation form.