Muscle   Energy   Dietary Supplement   Certified Vegan   Produced in a Certified Facility - GMP ( Good Manufacturing Practices )   May Support Libido and Lean Muscle   Tribest is a standardized extract of the tropical plant Tribulus terrestris , also known as " puncture vine ". The potent extract contains a minimum of 60 % soponins including furostanol and protodioscin . Paired with L - Arginine Tribest 750 may support libido , lean muscle mass and energy levels .