Jarrow Formulas Tribulus Complex is a blend of standardized Ayurvedic extracts used by athletes to enhance energy and post-exercise recuperation.* Tribulus, also know as puncture vine, contains flavonoid glycosides and 45% steroidal saponins. Sensoril™ Ashwagandha and Rhodiola extracts are adaptogens that support endurance. Andrograph extract contains 10% andrographolides, which are substances that support immune function and counter physical stress.* Green Tea Extract (40% polyphenols) is added to support the strength of capillaries and other blood vessels. Sensoril™ is protected under US Patent Nos. 6,153,198 and 6,713,092 and is a trademark of Natreon, Inc.