Equipment Reference

Double Wood Supplements

Double Wood Tongkat Ali

400mg Eurycoma longifolia extract for free testosterone support

4.3

(2,800 community reviews)

Double Wood Tongkat Ali provides 400mg of Eurycoma longifolia 200:1 extract per capsule. Used in natural testosterone optimization protocols for men with low-normal free T. Third-party tested, excellent value, and a common first-line option before escalating to TRT.

Used by

Men's health biohackersNatural T optimizersAthletes over 35Huberman Lab community

Typical price: $20 – $28 USD / 120 capsules

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How It Works

Tongkat ali (Eurycoma longifolia) appears to increase free testosterone by reducing SHBG binding and lowering cortisol, rather than directly stimulating testosterone production. The 200:1 extract concentrates eurycomanone and related quassinoids. Blood monitoring is essential — this is not a TRT substitute.

Free Testosterone

RCTs show ~15% increase in free testosterone in men with low-normal levels after 4 weeks.

Cortisol Reduction

Reduces cortisol by ~16%, improving the testosterone:cortisol ratio.

Libido Support

Improved libido and mood reported in men aged 40+ in clinical trials.

What You'll Experience

Week 2–4

Days 14–28

Subtle energy and libido improvements. Mood may stabilize.

Week 4–8

Days 28–56

Lab-measurable changes in free T and cortisol. Retest at 8 weeks.

Week 8–12

Days 56–84

Full effects plateau. Decide on continuing, cycling, or medical escalation.

Benefits

Free Testosterone

Moderate Evidence

~15% increase in free T in men with low-normal baseline levels.

Cortisol Balance

Moderate Evidence

~16% cortisol reduction in stressed adults.

Value

Anecdotal

Third-party tested 400mg dose at a fraction of branded extract prices.

Risks & Considerations

Adulteration Risk

medium risk

Tongkat ali is frequently spiked with steroids. Double Wood third-party tests, but always verify.

Insomnia

low risk

Mild stimulation in some users. Take in the morning only.

Not TRT

high risk

Clinically hypogonadal men need medical treatment, not herbal supplements.

Community Reviews

Synthesized consensus from Reddit, forums, and expert sources.

Reddit r/Testosterone

Mixed Reviews

Double Wood is the budget pick for tongkat ali. 'Got my free T from 8.5 to 11.2 pg/mL in 8 weeks. Not TRT-level gains, but enough to notice.'

·Best value for tongkat ali
·Get bloodwork before and after
·Works best for borderline low-normal T

View source

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Last updated: 2026-07-11 · Informational only. Not medical advice.