Standardized Tribulus Terrestris Extract. The Highest Potency Pro-Anabolic Spiking Formula. Who We Are: Universal Nutrition has been providing cutting edge and staple nutritional supplements to bodybuilders and hard training athletes the world over since 1977. As time passes, certain ideals never go out of style. Honesty. Integrity. Respect. These are the values we uphold and are the bedrock upon which we built our business. What It Is: Tribulus Pro is a natural supplement rich in potent biological substances, including saponins, flavonoids, alkaloids, plant sterols, metabolites and more, which together are responsible for the many physiological effects of Tribulus. How We Back It Up: What is on label is in the bottle and what is in the bottle will help you reach your goals. We guarantee it. Backed by our 100% Ironclad money back guarantee, we proudly stand behind every item we produce. If for whatever reason you are not satisfied with any product bearing our name, simply return the remainder to your place of purchase with a receipt for a full refund. Our word is our bond.