Tribulus terrestris has been used for centuries in ancient Greece, India and Africa to support fertility and rejuvenate the body.&ampnbsp; Recent scientific studies indicate that, although it actually contains no hormones,&ampnbsp;Tribulus helps to support healthy hormone production and male reproductive health.&ampnbsp; Tribulus has been used by some&ampnbsp;of the world's most elite athletes, but may be used by the recreational athlete as well.&ampnbsp; Our minimum 45% saponin content makes NOW&ampreg; Tribulus one of the most potent formulas available.*