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Ingredient dossier · No. 032

Tongkat Ali

Also: Eurycoma longifolia · longjack · Malaysian ginseng · pasak bumi


Promising for men with stress-related low Tonly buy from brands with third-party assays; the supplement market is full of underdosed and adulterated tongkat.


01 · Hormonal impact

Testosterone & hormonal load

Evidence
ModerateAnimal studies with mechanistic evidence

Tongkat ali (Eurycoma longifolia) root extract contains bioactive quassinoids including eurycomanone, believed to act as LH secretagogues and free testosterone boosters via SHBG modulation. RCTs in hypogonadal men and stressed individuals show meaningful testosterone increases and improvements in sexual function scores. However, adulteration and underdosing are rampant in the supplement market — independent lab tests frequently find products that fail label claims.


02 · Where it appears

Found in.

01Standalone tongkat ali capsules
02Testosterone booster blends
03Men's vitality supplements
04Pre-workout formulas

03 · The regulators

Two jurisdictions, two different verdicts.

European Union

Sold as a food supplement in EU. No specific restrictions.

United States · FDA

Dietary supplement ingredient under DSHEA. No clinical dosage guidance established.


04 · Sources

The receipts.

  1. [01]
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05 · Related dossiers
01AshwagandhaB · 7202BoronB · 7003ZincB · 78
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