Tribulus Terrestris

tribulus2Puncture Vine
120 caps/bottle  (Veggie Cap)

(now available directly from Alpha Science Laboratories at

Ingredients per capsule:
*Tribulus Terrestris (Puncture Vine) 625mg
*Standardized Extract – 35% Saponins

Suggested dose for adults: 2-3 capsules daily with meals or as directed by your health care practitioner.

Caution: Menopausal women may experience hot flashes with Tribulus Terrestris. Stomach upsets have been reported as an infrequent side effect. Taking this product with meals will diminish this effect. While there is no direct evidence that luteinizing hormone is directly responsible for hot flashes, studies have shown that hot flashes are preceded by a surge in luteinizing hormone release by menopausal women. Since Tribulus increases luteinizing hormone production there may be an increase in the frequency of hot flashes in menopausal women.

Primary action: This herb naturally and safely stimulates the pituitary gland to increase the production of luteinizing hormone thereby increasing free circulating testosterone. This has the effect of decreasing male and female infertility and male impotence and also of increasing libido.

In men, luteinizing hormone leads to an increase in testosterone production. Tribulus Terrestris stimulates the pituitary gland to release luteinizing hormone and has been found to increase the level of free circulating testosterone by approximately 40%. In studies, Tribulus Terrestris has been observed to increase the sperm count and also sperm mobility in males with low sperm count or non-viable sperm.

In women, luteinizing hormone causes maturation of the ova and also controls the production of androgenic hormones (e.g. testosterone). Studies have shown that women with low testosterone levels have a low libido. When testosterone levels in these women were increased artificially by ingesting testosterone, an increase in the libido was observed. However, when testosterone was given to these women the dosage had to be closely monitored in order to control the development of secondary male characteristics. With Tribulus Terrestris, the body produces luteinizing hormone, which controls the production of testosterone, which in turn is controlled by a negative feedback loop at several levels. The level of testosterone is then not allowed to rise dramatically, thus reducing the chance of negative side effects such as the development of secondary male characteristics associated with conventional drug treatments.