Tribulus Terrestris is a powerful plant extract, favourable for it’s ability to greatly enhance testosterone levels by increasing the pituitary hormone, luteinizing hormone (LH) which signals production of testosterone. Research studies evaluating the results of male subjects taking 750mg per day of Tribulus Terrestris reported a huge 72% increase in LH. Perhaps more importantly, biologically active free testosterone dramatically increased by 41%! What’s more, Tribulus Terrestris does not harbour any adverse side effects.