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Tongkat Ali (Eurycoma longifolia)

Libido · Free testosterone · Stress

Tier 3 — Trending

What it is

A Southeast Asian root extract with the strongest evidence for raising free (not total) testosterone in men with stress-related or age-related declines, and modest evidence for stress and exercise endpoints in both sexes. Standardised extracts (Physta, Eurycomanone-quantified) are what most positive trials use; generic root powders show inconsistent results. Effect size on testosterone is moderate, not pharmaceutical. Caution in hormone-sensitive cancers and pregnancy.

Efficacy

3/5

Safety

4/5

Research

3/5

Onset

2/5

Cost

3/5

Drug-int.

3/5

Dose

200–400 mg standardised extract (e.g. Physta) daily for 4–12 weeks

Time of day & tips

Take morning or pre-workout; cycle 8 weeks on / 2 weeks off is a common practice; avoid in hormone-sensitive cancers, pregnancy, and breastfeeding.

Sensitive populations: This supplement's evidence base touches pregnancy, pediatric, or other sensitive populations. Confirm any change with your healthcare provider before use.

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