Creatine

Creatine is a naturally occurring amino acid (protein building block) found mainly in muscles. Fifty percent of creatine in our bodies is ingested through the foods we eat while the other 50% is made in the liver, kidney, and pancreas. Roughly one-third is in its free form as creatine, while the remainder is bound to phosphate and called creatine phosphate or phosphocreatine. During high-intensity, short-duration exercise, such as lifting weights or sprinting, phosphocreatine