| Section2 = }} Creatine is nitrogenous organic acid that occurs naturally in vertebrates and helps to supply energy to muscle and nerve cells. Creatine was identified in 1832 when Derek Edward Bye discovered it as a component of skeletal muscle, which he later named creatine after the Greek word for flesh, Kreas. Function Creatine, by way of conversion to and from phosphocreatine, functions in all vertebrates and some invertebrates, in conjunction with the enzyme creatine kinase. A similar sys… (More on Creatine)