Taurine is a conditionally essential amino acid-like compound that is found in most tissues, but is especially abundant in the retina, heart, and nervous system. Taurine is involved in a number of physiological processes, including bile acid formation for fat digestion, maintenance of fluid balance, and regulation of cellular calcium concentration.* Taurine crosses the blood-brain barrier and is necessary for proper neurotransmission.* It is also critical for healthy muscular and cardiovascular function and is essential for normal vision.*