Tongkat Ali dietary supplements are commonly available from supplement and vitamin retailers such as Swanson Health Products and online marketplaces such as Amazon. The substance is extracted from the evergreen shrub eurycoma longifolia found in Southeast Asia, now considered a protected species due to high demand, as stated by WebMD.
Early research suggests that the bark and root of eurycoma longifolia improves the concentration of sperm in infertile men, increases testosterone levels, and increases muscle mass, according to WebMD. Although insufficient evidence exists for treating other conditions, individuals also use the supplement for erectile dysfunction, ulcers, high blood pressure, malaria, tuberculosis, headaches, diarrhea and cough. Individuals may also use Tongkat Ali to improve athletic performance and increase sex drive.
Taking eurycoma longifolia in medicinal doses for up to nine months is possibly safe, according to WebMD. Those who are pregnant or breast-feeding should avoid taking this substance due to a lack of research to determine its safety. Appropriate dosages are currently unknown due to insufficient research. However, clinical trials on mice fed a 2.6 grams per kilogram dosage of a eurycoma longifolia alcoholic extract have shown symptoms of acute toxicity such as shallow respiration, depression and convulsion, as stated by Drugs.com. Talk to a doctor before taking any amount of eurycoma longifolia.