Taurine is also called 2-ethanesuflonic acid. It is a sulfur-containing nonessential amino acid. It is one of the most abundant amino acids in the body and is found in muscle and organ tissues such as the heart and liver. It is a chemical that is a required building block of protein. Taurine is found naturally in fish, beef, poultry, and lamb. This amino acid has a number of mechanisms that may aid in athletic performance. Most significant, it is believed to affect cellular excitability by increasing the release of calcium from the sarcoplasmic reticulum (SR). Increases in calcium release from the SR will allow greater actin and myosin interaction improving muscle contractility and force production. Secondly, taurine is a powerful antioxidant capable of combating oxidative free radicals produced during exercise.