We are proud to present the strongest Tribulus Terrestris extract currently available with a massive 95% Saponin (active ingredient of Tribulus) content. We have also increased the amount of Tribulus per capsule to a mighty 300 mg! Tribulus terrestris has been used for centuries in ancient Greece, India and Africa to increase fertility and rejuvenate the body. It wasn't until the mid-eighties however, when a team of Bulgarian researchers determined that it may elevate growth compound production by increasing the blood levels of LH. The rest is history. Tribulus has been used by some of the world's most elite athletes, but is still safe enough for the weekend ironman.