Taurine is a sulfur-containing amino acid chemically known as beta-aminoethanesulfonic acid. Taurine is a metabolite of the amino acids methionine and cysteine and is foundin most cells. As an antioxidant, taurine is used to quench hypochlorite secreted by leukocyte immune cells. Taurine also aids in osmoregulation (maintenance of proper concentrations of ions) inside the cell. Taurine's other biological functions include cellular growth, membrane stabilization, sperm motility, bile acid conjugation and neuro transmission. Taurine may also benefit athletic performance as it acts as an insulin mimetic, there by allowing for better glucose deposition into muscles.