Tongkat Ali, also known as Longjack, Eurycoma longifolia, Pasak Bumi, and Malaysian ginseng, is an herbal remedy made from the roots of the small shrub with many applications including fevers, male infertility, boost athletic performance, increase muscle mass, erectile dysfunction, and much more.
Low testosterone can result from aging, chemotherapy, radiation treatments, some medications, injury or infection of the testicles, and certain diseases, such as chronic alcoholism and obstructive sleep apnea. A 1-month study in 76 older men with low testosterone found that taking 200 mg of Tongkat Ali extract per day significantly increased levels of this hormone to normal values in over 90% of participants
The health benefits of Tongkat Ali likely stem from various compounds found in the plant. Some of these boi-active compounds are quassinoids, canthine-6-one alkaloids, triterpenes, squalene derivatives, $-carboline alkaloids, etc which are mostly found in the root part. (Bashir)