Tongkat Ali
Commonly used for
EnergyFocusLibido
Where to Buy
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The cheapest product is usually low quality, but more expensive doesn’t always mean better.
Wellness uses
Sperm quality support, and testosterone support
This is anecdotal, and there isn't strong clinical evidence that it works for everyone.
What is it? / Overview
Tongkat Ali is one of the more promising herbal supplements for male reproductive health. Several human studies suggest modest improvements in libido, perceived stress, and testosterone in men with low baseline levels, although larger long-term trials are still needed.
How is it used? / Administration
Form: Standardized root extract (typically standardized for eurycomanone)
Typical dose studied: 200–400 mg/day
Timing: Morning with food
Among herbal testosterone supplements, Tongkat Ali has one of the strongest human evidence bases — though still moderate rather than definitive. Use standardized extracts with quantified eurycomanone content.
How well does it work? / Evidence
~ Moderate evidence
Who should avoid it?
Avoid with: Cancer — active or within past 12 months; Breastfeeding
Interacts with: Anticoagulants — theoretical; Diabetes medications
Already taking it? Reassess after approximately 8 weeks.
Research & references
Tambi MI et al. (2010). Eurycoma longifolia Jack in managing idiopathic male infertility. Asian J Androl. Talbott SM et al. (2013). Effect of Tongkat Ali on stress hormones and psychological mood state in moderately stressed subjects. J Int Soc Sports Nutr. George A, Henkel R. (2014). Phytoandrogenic properties of Eurycoma longifolia review. Andrologia.
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