ProveIt Supplements

Independent, evidence-based supplement analysis.

✓ Not Sponsored

✓ No Paid Reviews

✓ Science-Based

Company

  • About Us
  • Our Methodology
  • Contact
  • Blog
  • Authors

Legal

  • Privacy Policy
  • Terms of Service
  • Medical Disclaimer
  • Affiliate Disclosure

Resources

  • All Categories
  • Ingredient Database
  • Browse Supplements
  • FAQ

© 2025 ProveIt Supplements. All rights reserved.

Medical Disclaimer: The information provided is for educational purposes only and is not intended as medical advice. Always consult with a qualified healthcare professional before starting any supplement regimen.

Prove It
Browse SupplementsBlogAuthorsAboutMethodologyFAQ
Get Your Personalized Supplement StackSupplement Stack Quiz
Menu
HomeBrowse SupplementsBlogAuthorsAboutMethodologyFAQ
Back

Tongkat Ali Root

Also known as: Eurycoma longifolia, Tongkat Ali, Long Jack

Overview

Eurycoma longifolia, commonly known as Tongkat Ali or Long Jack, is a plant native to Southeast Asia. It is traditionally used as an herbal supplement for its aphrodisiac and profertility effects. The primary applications of Tongkat Ali include boosting testosterone levels and improving erectile function. It is known for its potential to increase testosterone levels and improve stress hormone profiles. Research on Tongkat Ali is considered to be at a moderate maturity level, with several systematic reviews and meta-analyses available. However, the quality of available evidence is variable, with some studies showing significant effects while others are plagued by methodological issues. It is available in various forms, including capsules, powders, and extracts, derived from the root of the plant.

Benefits

Tongkat Ali has been shown to increase testosterone levels, particularly in hypogonadal men. A systematic review and meta-analysis found a significant increase in total testosterone levels in men receiving E. longifolia supplementation (SMD = 1.352, 95% CI 0.565 to 2.138, p = 0.001). Some studies suggest improvements in erectile function, though more research is needed to confirm efficacy. Daily supplementation may also improve stress hormone profiles and mood states. Most benefits are noted in hypogonadal men, with significant effects observed primarily in testosterone levels. Benefits can be observed within weeks to months of supplementation.

How it works

The exact mechanism of action of Tongkat Ali is not fully understood, but it is believed to influence the hypothalamic-pituitary-gonadal axis, which can lead to increased testosterone production. It interacts with the endocrine system, potentially affecting hormone levels. While specific molecular targets are not well-defined, the herb's impact on hormone regulation is a key area of research. Data on the absorption and bioavailability of Tongkat Ali are limited, but water-soluble extracts may offer better absorption.

Side effects

Tongkat Ali is generally considered safe, but more research is needed on its long-term effects. Common side effects are not well-documented, but potential gastrointestinal issues have been reported. Rare side effects are also not well-documented. Tongkat Ali may interact with blood thinners or diabetes medications due to its effects on blood sugar and coagulation. It is contraindicated in pregnancy and breastfeeding due to a lack of safety data. Caution is advised in individuals with diabetes or bleeding disorders. It is important to consult with a healthcare provider before starting Tongkat Ali, especially if you have pre-existing medical conditions or are taking other medications.

Dosage

The minimum effective dose of Tongkat Ali is 100 mg/day, with optimal dosage ranges between 100–600 mg/day. The maximum safe dose is not well-established. It is typically taken once daily. Water-soluble extracts may be more effective. Bioavailability may vary based on the preparation. There are no documented required cofactors. Consult with a healthcare provider to determine the appropriate dosage for your individual needs. It may take several weeks to notice the effects of Tongkat Ali supplementation.

FAQs

Is Tongkat Ali safe to use?

Tongkat Ali is generally considered safe, but consult a healthcare provider before starting, especially if you are taking medications, to monitor for potential interactions.

How should I take Tongkat Ali?

It is recommended to take Tongkat Ali once daily, ideally with food. Follow the dosage instructions provided by your healthcare provider or on the product label.

How long does it take to see results from Tongkat Ali?

It may take several weeks to notice the effects of Tongkat Ali supplementation. Be patient and consistent with your dosage.

Can Tongkat Ali cure low testosterone?

No, Tongkat Ali is not a cure for low testosterone. If you suspect you have low testosterone, it is recommended to seek a medical evaluation.

Are there any side effects?

While generally safe, some may experience gastrointestinal issues. Monitor for any adverse effects and discontinue use if they occur.

Research Sources

  • https://pubmed.ncbi.nlm.nih.gov/36013514/ – This systematic review and meta-analysis of five randomized controlled trials (n=232) found a significant increase in total testosterone levels in men receiving Eurycoma longifolia supplementation, particularly in hypogonadal men. The study noted methodological issues and publication bias, but the overall quality was deemed moderate. The duration of the studies ranged from 2 weeks to 6 months.
  • https://www.mdpi.com/2076-3417/14/11/4372 – This study reviewed various research on Tongkat Ali and found potential benefits for erectile function and stress hormone profiles. However, the review also noted that more research is needed to confirm these findings. The quality of the studies reviewed varied.
  • https://www.publish.csiro.au/hc/pdf/HC22143 – This study investigated the effects of Eurycoma longifolia extract on stress hormones and mood state in moderately stressed subjects. The results indicated improvements in stress hormone profiles and certain mood parameters. This suggests a potential role for Tongkat Ali in managing stress and improving overall well-being.
  • https://examine.com/supplements/tongkat-ali/ – Examine.com provides a comprehensive overview of Tongkat Ali, summarizing the available research on its effects on testosterone, fertility, and other health outcomes. It highlights the potential benefits and limitations of the current evidence, offering a balanced perspective on the supplement's efficacy.

Supplements Containing Tongkat Ali Root

Competitive Mass by Lee Haney's Nutritional Support Systems
75

Competitive Mass

Lee Haney's Nutritional Support Systems

Score: 75/100
Healthy Hormone Formula by GNC Mega Men
50

Healthy Hormone Formula

GNC Mega Men

Score: 50/100
Healthy Hormone Formula by GNC Mega Men
58

Healthy Hormone Formula

GNC Mega Men

Score: 58/100
Libido Support For Women by DrFormulas
65

Libido Support For Women

DrFormulas

Score: 65/100
Testo Booster by DrFormulas
63

Testo Booster

DrFormulas

Score: 63/100
Libido Lift by Healthy Choice Naturals
58

Libido Lift

Healthy Choice Naturals

Score: 58/100
Horny Goat Weed by Doctor Recommended Supplements
68

Horny Goat Weed

Doctor Recommended Supplements

Score: 68/100
Horny Goat Weed 1000 mg by Dr. Tobias
63

Horny Goat Weed 1000 mg

Dr. Tobias

Score: 63/100