Tribulus terrestris is a perennial trailing plant that grows predominately in India and Africa. Tribulus is mentioned in ancient Indian Ayurvedic medical texts dating back thousands of years as a traditional herbal used by indiginous people. Recent scientific studies indicate that, although it actually contains no hormones, Tribulus helps to support healthy hormone production and male reproductive health. Tribulus has been used by some of the world's most elite athletes, but may be used by the recreational athlete as well. The minimum 45% saponin content makes NOW® Tribulus one of the most potent formulas available.