Tongkat Ali
Commonly used for
EnergyFocusLibido
Where to Buy
Our experts personally review each product we recommend for quality and cost effectiveness.
The cheapest product is usually low quality, but more expensive doesn’t always mean better.
The cheapest product is usually low quality, but more expensive doesn’t always mean better.
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, Imran MK. (2012). Eurycoma longifolia for idiopathic male infertility. Asian Journal of Andrology. Ismail SB et al. (2012). Eurycoma longifolia and stress hormones RCT. JISSN. George A, Henkel R. (2014). Phytoandrogenic properties of Eurycoma longifolia review. Andrologia.
Disclosure: Knozela is a participant in the Amazon Associates affiliate program. Some "Where to buy" links on this page are affiliate links -- if you make a purchase through them, Knozela may earn a commission at no additional cost to you.