Taurine is found naturally in fish, meat and breast milk. It is also commercially available as a dietary supplement in supermarkets and specialty food stores.
Taurine is a type of amino acid that regulates the body's fluid and salt levels while supporting healthy brain development and function. It has also been shown to improve athletic performance, which is why it is often found in energy drinks. According to Mayo Clinic, up to 3,000 milligrams of taurine per day is generally safe for most healthy adults. People with congestive heart failure who supplemented with taurine three times a day improved their exercise capacity in two weeks. Mayo Clinic advises using taurine in moderation, however; as of 2014, very little is known about the long-term effects of the supplement.