Tribulus is responsible for raising your natural production of testosterone. It does this by stimulating the production of Lutenizing Hormone (or pre testosterone). Testosterone is responsible for building muscle, keeping sex drive high, and decreasing bodyfat.
NutraBio Tribulus is standardized to a minimum of 45% saponin (the chemical in Tribulus responsible for raising testosterone levels). NutraBio does not use the whole plant tribulus powder, only the pure standardized extract.
Take 1/2 to 1 scoop mixed with your favorite beverage 2 times daily. Preferably with a meal.