Tongkat Ali (Eurycoma Longifolia Jack) is a flowering plant in the family Simaroubaceae, native to Indonesia and Malaysia. Tongkat Ali has been reported to contain the compounds eurycomanol, eurycomanone, and eurycomalactone. The plant is used in the traditional medicine of Indonesia, Malaysia and Vietnam. Traditionally, the root of the plant is boiled in water, and the water is consumed as a health tonic for post-partum recovery, as an aphrodisiac, as well as the relief of fever, intestinal worms, dysentery, diarrhoea, indigestion, and jaundice. As a supplement, it has been marketed for the supposed benefits of sexual health improvement, as an energy and stamina booster, for improving blood circulation and as a testosterone booster.