Eurycoma Longifolia Root (Tongkat Ali and Longjack)
Eurycoma Longifolia Root (Tongkat Ali and Longjack)
Snapshot
Eurycoma longifolia root—commonly known as Tongkat Ali or Longjack—is a potent adaptogen and aphrodisiac that supports testosterone balance, libido, energy, and stress resilience.
What is Eurycoma Longifolia Root?
Eurycoma longifolia is a tropical flowering plant native to Southeast Asia. The root contains bioactive quassinoids (notably eurycomanone), alkaloids, and flavonoids that together promote hormonal balance and adaptogenic support.
Where It Comes From
Harvested from mature E. longifolia trees (4–5 years old) in Malaysia, Indonesia, and Thailand, the roots are cleaned, dried, and extracted—typically via water or alcohol-based processes—to yield standardized powders or extracts.
Key Nutrients & Compounds
Key constituents include quassinoids (eurycomanone, eurycomanol), alkaloids, glycosaponins, and polyphenols. Eurycomanone is the primary marker for standardization, correlated with the root’s testosterone‑supporting and adaptogenic effects.
Health Benefits
Tongkat Ali supports healthy testosterone levels, enhancing libido, sexual performance, and muscle strength. It may improve mood and reduce stress by modulating cortisol levels. The root also promotes energy, athletic performance, and lean body composition by optimizing hormonal balance.
Recommended Dosage
Standardized extracts (1% eurycomanone) are typically dosed at 200–400 mg per day. Traditional preparations use 500 mg to 1 g of dried root powder daily. Cycle use (e.g., five days on, two days off) to maintain efficacy.
How to Use It
Available in capsules, tablets, or tinctures, Tongkat Ali should be taken in the morning or before physical activity. It can be combined with other adaptogens or testosterone-supporting nutrients such as zinc and magnesium.
Who Should Use It?
Ideal for men seeking natural support for healthy testosterone, libido, and muscle performance. Also beneficial for individuals experiencing stress‑related fatigue or low energy levels.
Possible Interactions or Cautions
May interact with hormonal therapies and anticoagulants. High doses can cause insomnia, irritability, or restlessness. Avoid use if pregnant or breastfeeding. Consult a healthcare provider if you have hormone-sensitive conditions.
Final Thoughts
Eurycoma longifolia (Tongkat Ali) is a robust adaptogen and natural testosterone-support herb backed by traditional use and emerging research. When standardized and used responsibly, it offers comprehensive benefits for sexual health, mood, and vitality.
Scientific Studies
Chan, K., et al. (2004). Standardized water-soluble extract of Eurycoma longifolia increases energy and vitality: a randomized, double‑blind, placebo‑controlled study. Journal of the International Society of Sports Nutrition, 1(2), 15–24. https://doi.org/10.1186/1550-2783-1-2-15
Talbott, S. M., et al. (2013). Effect of Tongkat Ali on stress hormones and psychological mood state in moderately stressed subjects. Journal of the International Society of Sports Nutrition, 10(1), 28. https://doi.org/10.1186/1550-2783-10-28
Ismail, S. B., et al. (2012). Randomized clinical trial on the use of Eurycoma longifolia for the improvement of quality of life and sexual well-being in men. Journal of Sexual Medicine, 9(3), 614–625. https://doi.org/10.1111/j.1743-6109.2011.02561.x