Tongkat Ali (Eurycoma Longifolia)
Research suggests this traditional Southeast Asian herb may support testosterone levels and stress response in men.
Human Trials
12
847 participants
Risk Level
Monthly Cost
Varies significantly by extract concentration and standardization
Quick Facts
- Category
- Supplement
- Research Field
- Supplements
- Evidence Grade
- B- – Promising
- Risk Level
- Low
- Monthly Cost
- $25 – $80
- Human Trials
- 12
Typical Dose
200–400 mg/day standardized extract (1:200 root extract)
Range
100–600 mg/day
For informational purposes only – not medical advice. See disclaimer
Research Velocity
Mechanism of Action
Tongkat Ali contains bioactive compounds called eurycomanone and eurycomanol that research indicates may influence the hypothalamic-pituitary-gonadal axis. Studies suggest it may reduce cortisol levels while potentially supporting luteinizing hormone release, which could indirectly influence testosterone production. The herb may also exhibit adaptogenic properties, helping the body manage physical and psychological stress.
Overview
Tongkat Ali (Eurycoma longifolia) is a traditional medicinal plant native to Southeast Asia that has gained attention as a potential natural testosterone booster and adaptogenic herb. Research indicates that standardized extracts may support healthy testosterone levels in men with low-normal testosterone, with some studies suggesting improvements in energy, mood, and sexual function. The herb appears to work by potentially reducing cortisol levels and supporting the body's natural hormone production pathways rather than directly providing hormones.
Studies suggest that Tongkat Ali may be particularly beneficial for men experiencing age-related testosterone decline or those dealing with chronic stress. Clinical trials have indicated potential improvements in fatigue, mood, and overall quality of life, though most research has focused on middle-aged men. The herb's adaptogenic properties may also help support the body's response to physical and psychological stress, making it of interest to both aging populations and active individuals seeking natural performance support.
While generally well-tolerated, the quality and potency of Tongkat Ali supplements can vary significantly between products. Research has primarily used standardized extracts with specific concentrations of active compounds like eurycomanone, suggesting that standardization may be important for consistent effects. As with any supplement affecting hormone levels, individuals with hormone-sensitive conditions or those taking medications should consult healthcare providers before use.
Known Interactions
- May interact with diabetes medications by potentially lowering blood sugar
- Could theoretically interact with hormone-sensitive conditions or medications
- May enhance the effects of stimulant medications due to potential energy-boosting properties
- Limited interaction data available; consult healthcare provider before combining with medications
Legal Status by Country
Your country (United States)
Available without prescription in:
Australia, Brazil, Canada, China, Colombia, Germany, India, Israel, Japan, Mexico, Netherlands, Panama, Russia, South Korea, Switzerland, Thailand, Turkey, UAE, United Kingdom, United States
📍 = your selected country · ✈️ = medical tourism destination · Always verify current local regulations before travel.
Key Research
- 2013
Primary testosterone study in aging men
- 2013
Stress response and cortisol reduction study
- 2012
Comprehensive review of male health applications
- 2011
Mechanism of action study on key bioactive compound
- 2012Randomized clinical trial on the use of PHYSTA freeze-dried water extract of Eurycoma longifolia for the improvement of quality of life and sexual well-being in men
Quality of life and sexual function study
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Last verified: 2026-03-19