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Tongkat Ali supplement
Adaptogenic Root

Tongkat Ali: Benefits, Dosage, Forms & Research

Adaptogenic Root

This content is for informational purposes only and does not constitute medical advice. Consult your healthcare provider before starting any supplement. Full disclaimer

TL;DR — Quick Answer

Tongkat ali is a Southeast Asian root with moderate evidence for testosterone support, stress reduction, and male sexual health. It works primarily by freeing bound testosterone from SHBG. Standard dose is 200-400mg standardized root extract (100:1 or 200:1) daily.

Key Facts

What it is
A Southeast Asian root (Eurycoma longifolia) used to support testosterone and male vitality
Primary benefits
  • Supports healthy testosterone levels
  • Reduces cortisol and stress
  • Improves male sexual health
  • Enhances body composition and strength
  • Supports male fertility
Typical dosage
200-400mg standardized root extract daily
Evidence level
Moderate
Safety profile
Safe with Caution

What the Research Says

Tongkat ali has a growing body of clinical evidence, particularly from Malaysian research groups. Talbott et al. (2013) published one of the most cited studies, demonstrating significant testosterone increases and cortisol reductions in moderately stressed adults. Ismail et al. (2012) showed benefits for late-onset hypogonadism. Tambi et al. (2012) provided the largest fertility dataset (n=350) with notable pregnancy rate improvements. However, many studies have been industry-funded and used the patented Physta extract. Independent replication with diverse populations is needed. A 2022 systematic review (Thu et al.) concluded there is "promising but not conclusive" evidence for testosterone and male fertility benefits.

Benefits of Tongkat Ali

  • Testosterone support — Talbott et al. (2013, n=63) found 200mg/day tongkat ali significantly improved testosterone levels (+37%) and cortisol (-16%) in moderately stressed adults over 4 weeks
  • Stress reduction — the same study (Talbott et al., 2013) showed significant reductions in tension (-11%), anger (-12%), and confusion (-15%) mood state profiles
  • Male sexual health — Ismail et al. (2012, n=109) demonstrated 300mg/day tongkat ali improved erectile function, libido, and semen parameters in men with late-onset hypogonadism
  • Body composition — Hamzah & Yusof (2003) showed tongkat ali supplementation improved lean body mass and strength in a pilot study of resistance-trained men
  • Male fertility — Tambi et al. (2012, n=350) reported that 200mg/day for 9 months improved sperm concentration, motility, and morphology, with 14.7% spontaneous pregnancy rate in infertile couples
Did you know?

Tongkat ali has a growing body of clinical evidence, particularly from Malaysian research groups.

Forms of Tongkat Ali

FormBioavailabilityBest For
Standardized Root Extract (100:1 or 200:1)HighGeneral use — concentrated extract standardized to eurycomanone
Physta (patented extract)HighClinical use — the most studied branded extract
Root PowderLow-ModerateTraditional preparation — extremely bitter, lower potency

Dosage Recommendations

General recommendation: 200-400mg standardized root extract daily (100:1 concentration)

Timing: Morning, preferably on an empty stomach

Dosage by Condition

ConditionRecommended DoseEvidence
Testosterone support200-400mg daily for 4-12 weeksModerate
Stress/cortisol200mg dailyModerate
Sexual health200-300mg dailyModerate
Fertility200mg daily for 3-9 monthsEmerging

Upper limit: 600mg/day of standardized extract

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Our recommendations are based on published research, not commission rates. Some links below are affiliate links — we may earn a commission at no extra cost to you. How we evaluate products

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Side Effects and Safety

Safety profile: Safe with Caution

Potential Side Effects

  • Mild insomnia and restlessness
  • Irritability or aggressiveness (rare)
  • Mild GI discomfort
  • Elevated body temperature or sweating
  • Generally well-tolerated at standard doses in clinical trials

Drug & Supplement Interactions

  • May interact with testosterone replacement therapy (additive effects)
  • May lower blood sugar — monitor with diabetes medications
  • May interact with antihypertensive medications (mild blood pressure effects)
  • Avoid with hormone-sensitive cancers (testosterone-dependent tumors)
  • May interact with immunosuppressant drugs (immunostimulatory effects)
Check Tongkat Ali interactions with other supplements →
BenefitsDosage GuideSide EffectsTypes & FormsResearchFAQ

Related Conditions

Stress

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Frequently Asked Questions

Does tongkat ali actually increase testosterone?

Multiple clinical trials show tongkat ali increases total and free testosterone, particularly in men with suboptimal levels (stressed, aging, mildly hypogonadal). Talbott et al. (2013) found a 37% increase in testosterone in moderately stressed adults. However, the effects may be more pronounced in those with lower baseline levels. In young, healthy men with already-optimal testosterone, increases are likely more modest.

How long does tongkat ali take to work?

Hormonal and stress benefits typically emerge within 2-4 weeks of daily use. The Talbott et al. study showed significant changes at 4 weeks. For fertility improvements, longer supplementation (3-9 months) is recommended based on the Tambi et al. study. Cycling (8-12 weeks on, 2-4 weeks off) is commonly recommended.

Is tongkat ali safe for women?

While tongkat ali is primarily marketed to men, some research suggests benefits for women including improved mood and stress profiles. The Talbott et al. (2013) study included both men and women. However, due to its testosterone-modulating effects, women with hormone-sensitive conditions should exercise caution. There is no evidence it causes virilization at standard supplement doses.

References

  1. (). Effect of Tongkat Ali on stress hormones and psychological mood state in moderately stressed subjects. Journal of the International Society of Sports Nutrition. DOI
  2. (). Randomized clinical trial on the use of PHYSTA freeze-dried water extract of Eurycoma longifolia for the improvement of quality of life and sexual well-being in men. Evidence-Based Complementary and Alternative Medicine. DOI
  3. (). Standardised water-soluble extract of Eurycoma longifolia, Tongkat ali, as testosterone booster for managing men with late-onset hypogonadism. Andrologia. DOI