Tongkat AIi also called longjack is a herbal supplement that comes from the roots of the green shrub tree Eurycoma longifolia, which is native to Southeast Asia.
For centuries, people have used Tongkat AIi for its purported strength and energy benefits. In fact, several studies have noted test-promoting effects from people taking a Tongkat AIi supplement.
In addition to supporting testosterone, Fadogia Agrestis is often used by athletes to improve performance. Fadogia contains many other beneficial compounds which help with this effect such as saponins, anthraquinones, flavonoids, and glycosides.