Taurine is an amino acid that regulates water and minerals in your blood, as well as has antioxidant properties. Its found naturally in met, fish and many other food so few people actually need to take a supplement of taurine on the side. It is becoming increasingly popular with athletes who find it can help their performance at times. Taurine is considered a safe supplement, because your body only uses what it needs and the rest is flushed out through your kidneys. The research is still somewhat limited, so as with all supplements/additives moderation is probably best.