Taurine is a type of chemical called an aminosulfonic acid. It occurs naturally in the body. The best food sources are meat, fish and eggs. Taurine has important functions in the heart and brain. Helps support nerve growth. It may also benefit people with heart failure by lowering blood pressure and calming the nervous system. This can help prevent heart failure from getting worse. People take taurine for congestive heart failure (CHF) and swelling of the liver (hepatitis). It is also used for obesity, sports performance, fatigue, diabetes and many other conditions.