Standardized for 45% Saponins. Supports natural release and production of testosterone. Boost muscle strength and power. Tribulus Terrestris is a vine plant with a long history of widespread use. Historically, Tribulus has been of used in ancient Greece, India and Africa for fertility and to rejuvenate the body. 4DN Tribulus contains ultra high potency Tribulus Extract, known for superior amounts of active saponins. More recently, people around the world have started taking Tribulus to support testosterone release, encourage muscle development, help recovery and endurance and support healthy libido function.