Optimum Nutrition's Tribulus 625 Caps are made with Tribulus Terrestris. Each capsule contains a 625 mg blend of Tribula Terrestris powder and extract- standardized to 40% Furastanol Saponin content. Tribulus 625 Caps also contain various sterols, flavonoids and other plant compounds that naturally occur in this species. Beyond The Basics # Made With Tribulus Terrestris # Each Capsule Contains a 625 mg Blend of Tribulus Terrestris Powder and Extract - Standardized to 40% FURASTANOL SAPONIN CONTENT # Also Contains Various Sterols, Flavonoids, and Other Plant Compounds That Naturally Occur in This Species