Standardized to 60% Steroidal Saponins May Support Libido and Lean Muscle 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.MRM