Taurine, or 2-aminoethanesulfonic acid, is an organic acid. It is also a major constituent of bile and can be found in the lower intestine and, in small amounts, in the tissues of many animals, including humans.[1][2] Taurine is a derivative of the sulfur-containing (sulfhydryl) amino acid cysteine. Taurine is one of the few known naturally occurring sulfonic acids