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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

Low Risk

Monthly Cost

$25$80 /month

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

Timingmorning with or without food
FormEurycoma longifolia root extract, standardized to eurycomanone
Notes1:200 extract ratio is the most studied form. Cycle 5 weeks on / 1 week off is commonly recommended. Modest testosterone-raising effect in men with suboptimal baseline levels; less effect in those with normal testosterone.

For informational purposes only – not medical advice. See disclaimer

Research Velocity

+29%
18 publications in the last 12 months · major increase in publications

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)

OTC
✈️

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

Australia
OTC
✈️Brazil
OTC
Canada
OTC
China
OTC
✈️Colombia
OTC
Germany
OTC
✈️India
OTC
✈️Israel
OTC
Japan
OTC
✈️Mexico
OTC
Netherlands
OTC
✈️Panama
OTC
Russia
OTC
✈️South Korea
OTC
Switzerland
OTC
✈️Thailand
OTC
✈️Turkey
OTC
✈️UAE
OTC
United Kingdom
OTC
📍United States
OTC

📍 = your selected country · ✈️ = medical tourism destination · Always verify current local regulations before travel.

Key Research

Last verified: 2026-03-19