Taurine is an amino acid found in the heart muscle, white blood cells, and central nervous system. It is a building block of all other amino acids. It may aid in cardiovascular support; the utilization of potassium, calcium, sodium, and magnesium; brain support, and eye function. It can be found singly, as part of an amino acid complex, or as part of a sports supplement. It can also be found in eggs, meat, and milk, but not vegetable proteins.