Tribulus, a traditional Ayurvedic herb commonly known as the "puncture vine", has been used for centuries in Europe as a treatment for impotence and as a stimulant to help enhance sexual drive and performance. Tribulus has been shown to increase LH (luteinizing hormone) production and boost testosterone levels. Tribulus exerts its testosterone-elevating effects by stimulating an increase in LH, which is responsible for "telling" your body to produce testosterone. Testosterone is a vital hormone responsible for the development of secondary sexual traits, as well as increasing muscle size and strength. As a result, Tribulus as also been shown to increase energy and stamina, and to speed muscle recovery after muscle fibers have been broken down as a result of exercise.