The claimEvidence C · limited
Tongkat Ali strongly raises testosterone
The evidence
T uplift is on the same order as Ashwagandha (~10%) — within physiological variation, far below marketing claims.
The mechanism, in brief
Tongkat Ali = the root of Eurycoma longifolia:
Sources (1)
- Rehman, S. U., Choe, K., & Yoo, H. H. (2016). Review on a traditional herbal medicine, Eurycoma longifolia Jack (Tongkat Ali): its traditional uses, chemistry, evidence-based pharmacology and toxicology. Molecules, 21(3), 331. Reviews documented mercury and lead contamination in Malaysian and Indonesian tongkat ali commercial preparations.