Tribulus terrestris, also known as puncture vine, is a herb that has been used in the traditional medicine of China and India for centuries.
In the mid-1990s, tribulus terrestris became known in North America after Eastern European Olympic athletes said that taking tribulus helped
their performance. The active compounds in tribulus are called steroidal saponins.
Two types, called furostanol glycosides and spirostanol glycosides,
appear to be involved with the effects of tribulus. These saponins are found primarily in the leaf.
Tribulus is most often used for infertility, erectile dysfunction, and low libido. In the last decade, it has become popular to improve sports performance.
Tribulus has been marketed these conditions because research performed in Bulgaria and Russia indicates that tribulus increases levels of the hormones
testosterone (by increasing luteinizing hormone), DHEA, and estrogen.