Tongkat Ali (Eurycoma longifolia)

Evidence: ★★★☆☆ · Status: OTC Supplement

In plain English

Frees up testosterone that's chemically "handcuffed," and lowers stress hormone — so more of your own T is usable. Best evidence of the herbal T-boosters.

How it works

Eurycomanone quassinoids lower SHBG (freeing bound testosterone) and reduce cortisol, raising the free-T:cortisol ratio — most in stressed men.

Molecular target & official sources

SHBG (NCBI Gene) · Eurycomanone (PubChem CID 10547207)

Protocol

200–400 mg standardised (Physta/LJ100).

Watch out

Heavy-metal contamination in poor-quality sources.

Bottom line

The most credible herbal testosterone support.

Helps with: Hormones & Testosterone · Stress & Anxiety · Sexual Health

Stacks with

Shares a pathway — often paired with: Omega-3 (EPA/DHA), Vitamin D3 (+ K2), Testosterone (TRT), Finasteride / Dutasteride.

Avoid combining with

Hormone-sensitive conditions — it can raise testosterone; get advice if you have prostate issues.

Availability & where to buy

Available over the counter. Widely available OTC — e.g. iHerb (ships worldwide); in Singapore also Guardian, Watsons, GNC, Shopee / Lazada. Look for a third-party-tested / GMP mark and check the dose per serving. ~S$25–45/month; look for a standardised extract (Physta / ~1.5% eurycomanone), not raw powder.

How it works: the Nuclear receptors pathway →

Used in these protocols

• Low Testosterone
• Low Libido

Compare Tongkat Ali (Eurycoma longifolia)

• Tongkat Ali (Eurycoma longifolia) vs Testosterone (TRT)
• Tongkat Ali (Eurycoma longifolia) vs Finasteride / Dutasteride
• Tongkat Ali (Eurycoma longifolia) vs PDE-5 Inhibitors (Sildenafil / Tadalafil)
• Tongkat Ali (Eurycoma longifolia) vs Anastrozole / Exemestane (Aromatase Inhibitors)
• Tongkat Ali (Eurycoma longifolia) vs PT-141 (Bremelanotide / Vyleesi)
• Tongkat Ali (Eurycoma longifolia) vs Nandrolone (Deca-Durabolin)
• Tongkat Ali (Eurycoma longifolia) vs Melanotan II