Jarrow Formulas Tribulus Complex is a blend of standardized Ayurvedic extracts used by athletes to enhance energy and post-exercise recuperation. Tribulus, also known 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.