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Tongkat Ali
Supports testosterone levels, stress hormone balance, and male reproductive health.
What it’s good for
Tongkat Ali for Stress
Solid1 study · 1 supporting · 0 against
7 safety notes
Lowers cortisol and shifts your stress hormone balance in a steadier direction.
Dose: 200–400 mg
Tested as: Physta™ standardised hot-water root extract of Eurycoma longifolia (Biotropics Malaysia Berhad), 200 mg/day
Tongkat Ali for Low Stamina
Mixed3 studies · 2 supporting · 1 against
7 safety notes
Thought to support testosterone, which in turn supports physical performance.
Dose: 200–400 mg
Tested as: Physta® standardised aqueous root extract of Eurycoma longifolia (Biotropics Malaysia Berhad)
Tongkat Ali for Chronic Fatigue
Not verified1 study · 1 supporting · 0 against
7 safety notes
Why it gets suggested: An adaptogen, meant to cut how tired you feel by steadying hormones.
Dose: 200–400 mg
Why we could not verify it: Every identified RCT of Eurycoma longifolia uses the proprietary Physta® freeze-dried water extract (Biotropics Malaysia). None targets chronic fatigue syndrome or a population with fatigue as the defining inclusion criterion. The closest result is PMC6294837 (DOI: 10.29219/fnr.v62.1374), a 24-week RCT in moderately stressed healthy adults that found an 11.2% improvement in the POMS energy/fatigue subscale ratio at week 12 — but that trial combined Physta® with a full multivitamin formulation, making it impossible to attribute any fatigue effect to Tongkat Ali alone. The other major RCT (DOI: 10.1155/2012/429268) targeted sexual well-being and quality of life and did not measure fatigue. A p