Dietary Supplement. The Highest Potency Pro-Anabolic Spiking Formula Standardized Tibulus Terrestris Extract. 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. 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 hold and are the be.