A Dietary Supplement. Men's support formula. With 300 mg of tongkat ali (eurycoma longifolia jack extract). Vegetarian/vegan. GMP quality assured. Eurycoma longifolia jack is the scientific name for what is more commonly known at tongkat ali, Malaysian ginseng, or longjack. Although every part of the tongkat ali plant is used by traditional herbalists of Southeast Asia, it's root is especially prized. Tongkat ali is known to possess various naturally occurring bioactive compounds, including eurypeptides and saponins. Now TestoJack 300 delivers 300 mg non-GMO tongkat ali extract per capsule. (These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.)