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3Medicinal

Tongkat ali

Also sold as Eurycoma longifolia, longjack

A Southeast Asian root marketed for testosterone and libido — small trials show modest effects, mostly in stressed or low-testosterone men.

TrustedSupp Tier System™ · Tier 3Take as a defined course

Evidence strength

38/100Limited
WEAKLIMITEDMODERATESTRONGVERY STRONG

What the evidence supports: modest testosterone increases in small trials, mainly in men with low levels or high stress.

This scores how well-supported the claim above is — not how much benefit you personally would get. A high score on a narrow claim does not extend to everything the product is marketed for.

How long to take it

Course-based, commonly 4–12 weeks; long-term use is not well studied.

Who it's actually for

Men with low-normal testosterone or high stress, after a blood test — not a substitute for evaluating symptoms of low testosterone.

Safe upper limit

Unverified
No formal upper limit; 200–400 mg of standardised extract daily in trials
Short-term use appears well tolerated in trials. Product quality is the bigger risk: heavy-metal contamination and adulteration with undeclared drugs have been reported in some tongkat ali products.
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Interactions to know about

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Practical notes

  • Get testosterone measured before and after, rather than judging by feel.
  • Choose third-party tested products — contamination and adulteration have been documented.
  • Avoid with hormone-sensitive conditions or if you take hormone therapy.