# Tongkat Ali (Eurycoma Longifolia)

**Canonical URL:** https://ingredients.hermeticasuperfoods.com/ingredients/tongkat-ali-eurycoma-longifolia
**Data Source:** Hermetica Superfoods Ingredient Encyclopedia
**Updated:** 2026-03-18
**Evidence Score:** 8 / 10
**Category:** Adaptogen
**Also Known As:** Eurycoma longifolia, Malaysian Ginseng, Longjack, Pasak Bumi, Tho Nan, Cay Ba Binh, Ali's Umbrella, Bedara Merah

## Overview

Tongkat Ali (Eurycoma longifolia) contains quassinoids, particularly eurycomanone, which enhance [testosterone production](/ingredients/condition/hormonal) by stimulating luteinizing hormone release from the pituitary gland. This Malaysian herb also reduces cortisol levels through modulation of the [hypothalamic-pituitary-adrenal](/ingredients/condition/stress) axis, improving stress response and [energy metabolism](/ingredients/condition/energy).

## Health Benefits

- Enhances [testosterone levels](/ingredients/condition/hormonal) and sexual health by stimulating hormone production, leading to improved libido and sexual performance. - Supports stress reduction and mood improvement by lowering [cortisol levels](/ingredients/condition/stress), which can enhance overall well-being. - Boosts energy levels by increasing [ATP production](/ingredients/condition/energy), providing sustained energy throughout the day. - Supports muscle growth and recovery by enhancing protein synthesis, leading to improved muscle mass and strength. - Improves bone density by promoting calcium retention, reducing the risk of fractures and [osteoporosis](/ingredients/condition/bone-health). - Enhances cognitive function by improving focus and mental clarity, as supported by studies showing a 15% increase in [cognitive performance](/ingredients/condition/cognitive). - Supports immune health by boosting the body's natural defenses, reducing the frequency of infections.

## Mechanism of Action

Tongkat Ali's primary bioactive compounds, eurycomanone and other quassinoids, stimulate the hypothalamic-pituitary-gonadal axis by increasing luteinizing hormone (LH) release, which signals [testosterone production](/ingredients/condition/hormonal) in Leydig cells. The herb also inhibits phosphodiesterase enzymes and modulates the [HPA axis](/ingredients/condition/stress) by reducing cortisol synthesis. Additionally, quassinoids enhance cellular ATP production through improved [mitochondrial function](/ingredients/condition/energy) and [glucose metabolism](/ingredients/condition/weight-management) pathways.

## Clinical Summary

Multiple randomized controlled trials involving 200-400 participants demonstrate significant [testosterone](/ingredients/condition/hormonal) increases of 15-37% with 200-400mg daily doses over 4-12 weeks. Studies show [cortisol reduction](/ingredients/condition/stress)s of 16-26% and improved sexual function scores in both healthy and subfertile men. However, most studies are relatively small-scale (25-109 participants) and conducted primarily in Southeast Asian populations, limiting broader generalizability. Evidence quality is moderate, with some studies lacking proper placebo controls.

## Nutritional Profile

- Contains quassinoids, compounds with health benefits. - Rich in eurycomanone, supporting [testosterone levels](/ingredients/condition/hormonal). - Provides [antioxidant](/ingredients/condition/antioxidant)s.

## Dosage & Preparation

Commonly consumed in extract or capsule form, with a dosage of 200-400 mg per day. Consult a healthcare provider before use.

## Safety & Drug Interactions

Tongkat Ali is generally well-tolerated with mild side effects including restlessness, [insomnia](/ingredients/condition/sleep), and increased body temperature reported in some users. It may interact with diabetes medications by affecting [blood glucose](/ingredients/condition/weight-management) levels and could potentially interfere with hormone-sensitive conditions or medications. The herb should be avoided during pregnancy and breastfeeding due to insufficient safety data. Individuals with prostate cancer or other hormone-sensitive conditions should consult healthcare providers before use.

## Scientific Research

Several RCTs support its benefits for [testosterone](/ingredients/condition/hormonal) and stress reduction. More research is needed to confirm athletic performance benefits.

## Historical & Cultural Context

Tongkat Ali has been used in traditional medicine in Malaysia and Indonesia for centuries as a tonic and aphrodisiac.

## Synergistic Combinations

Maca, Tribulus, Ginseng

## Frequently Asked Questions

### How much tongkat ali should I take daily

Clinical studies typically use 200-400mg daily of standardized extract containing 0.8-1.5% eurycomanone. Most studies show benefits with 200mg taken once daily, while some use split doses of 200mg twice daily for enhanced effects.

### How long does tongkat ali take to work

Testosterone increases typically appear within 2-4 weeks of consistent use, with peak benefits observed after 8-12 weeks. Energy and mood improvements may be noticed within 1-2 weeks, while sexual function improvements generally require 4-6 weeks of supplementation.

### Does tongkat ali increase testosterone in women

Limited research suggests tongkat ali may provide modest testosterone increases in women, potentially improving energy and libido. However, most studies focus on men, and women should use lower doses (100-200mg) due to different hormonal sensitivities and potential masculinizing effects.

### Can tongkat ali cause side effects

Common mild side effects include restlessness, insomnia, increased body temperature, and occasional digestive upset. These effects are typically dose-dependent and resolve with dosage reduction. Rare cases of mood changes or increased aggression have been reported with high doses.

### Is tongkat ali safe to take with other supplements

Tongkat ali generally combines safely with most supplements, but caution is advised with other testosterone boosters, stimulants, or adaptogens to avoid overstimulation. It may enhance the effects of blood sugar-lowering supplements and should be monitored with diabetes medications due to potential glucose-lowering effects.

### What does clinical research show about tongkat ali's effectiveness for testosterone and sexual function?

Multiple peer-reviewed studies demonstrate that tongkat ali extract can increase testosterone levels by 23-37% and improve sexual function in men with low testosterone within 12 weeks of consistent use. Research published in journals like the *Journal of the International Society of Sexual Medicine* shows improvements in erectile function, sexual desire, and overall satisfaction. However, most evidence is strongest in men with baseline testosterone deficiency, with effects more modest in those with normal baseline levels.

### Is tongkat ali safe during pregnancy and breastfeeding?

Tongkat ali is not recommended during pregnancy or breastfeeding due to insufficient safety data and its testosterone-boosting mechanisms, which could potentially affect fetal development or infant health. There are no adequate human studies evaluating its safety in these populations, making it prudent to avoid use unless under direct medical supervision. Women of childbearing age planning conception should also consult a healthcare provider before supplementation.

### Does tongkat ali interact with testosterone replacement therapy or hormonal medications?

Tongkat ali may have additive effects when combined with testosterone replacement therapy or hormonal medications, potentially raising testosterone levels excessively and increasing risk of side effects like acne, mood changes, or cardiovascular strain. It should not be used alongside prescription hormone therapies without medical supervision to monitor hormone levels. Individuals on hormonal contraceptives, hormone replacement therapy, or other endocrine-modulating medications should consult their healthcare provider before supplementing with tongkat ali.

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