Natural Testosterone Booster; Extracted from the Eurycoma Longifolia plant, Long Jack complex with Tribulus supports improved testosterone levels, especially in older individuals Made and tested in the USA; Our Tongkat Ali Complex capsules are made in the USA and safety tested for heavy metal and microbes in a state of the art New York facility May improve muscle mass; Tongkat Ali Complex contains compounds called quassinoids, eurycomaosides, eurycolactones, and saponins which help the body use energy; This helps build muscle and boost athletic performance May boost exercise endurance; Tongkat and Tribulus have both been shown to support exercise endurance to help you achieve the best workout possible Many other health benefits; Tongkat Ali Complex may help support blood pressure, relieve stress, reduce anxiety, improve mood