Taurine (in POWER HORSE Energy Drink) is a "life-supporting compound" and an essential amino acid naturally produced in the human body. Taurine can be found in high amounts in human tissue, especially in muscle, liver, lungs, brain and bile. During times of extreme physical exertion, the body can not produce the required amounts of taurine, and a relative deficiency results. Taurine acts as a metabolic transmitter and additionally, taurine has a detoxifying effect and strengthens cardiac contractility.