Ingredient label guide

Tongkat Ali: Extracts, Claims, and Label Guide

How to distinguish root powder from standardized and ratio extracts, interpret eurycomanone and 200:1 claims, and keep product-specific human evidence separate from testosterone-booster marketing.

Also listed as: Eurycoma longifolia, longjack, pasak bumi, Malaysian ginseng, Tongkat Ali root, or Tongkat Ali root extract.

NutriDetector Editorial Team Updated July 27, 2026 Editorial Policy

Overview

What is Tongkat Ali?

Tongkat Ali is the common name for Eurycoma longifolia, a Southeast Asian tree whose root is used in traditional preparations and modern supplements. Retail labels may describe plain root powder, a generic root extract, a ratio extract, a standardized extract, or a branded raw material. Those descriptions are not interchangeable.

Brands commonly place Tongkat Ali in products marketed for libido, testosterone support, vitality, stress resilience, and exercise performance. It also appears in multi-ingredient formulas with zinc, boron, ashwagandha, or Fadogia agrestis. Their presence together does not establish synergy, effectiveness, or safety for the finished formula.

Why preparation identity matters

Human studies have not tested every material sold under the name Tongkat Ali. Study findings belong to the named preparation, amount, population, comparator, and duration. A generic 200:1 product cannot inherit the results of a standardized water extract merely because both labels use the same plant name.

Evidence and claims

A possible signal is not a universal testosterone result

Total testosterone

A 2022 systematic review included nine human studies and pooled five randomized trials involving 232 participants. It reported a positive overall signal for total testosterone, including in the review authors’ subgroup defined by baseline total testosterone below 300 ng/dL. However, statistical inconsistency was high (I² 87.27%), publication bias was detected in the review authors’ hypogonadism subgroup, and seven of the nine studies used the same commercial water extract. That research cutoff is not equivalent to a clinical diagnosis of hypogonadism, and the pooled result cannot be generalized to every Tongkat Ali preparation. ^{1,
8}

One standardized extract

In a 12-week trial of 105 men aged 50 to 70 years with total testosterone below 300 ng/dL, a branded standardized water extract at 100 or 200 mg increased total testosterone at some time points compared with placebo. Free testosterone did not show a significant between-group difference. The extract manufacturer funded the study, and two authors were employees of that company. ²

Sexual function

A 2015 meta-analysis found only two randomized trials with 139 participants. It found no significant overall difference in the erectile-function score at 12 weeks, although a subgroup with lower baseline scores showed a signal. That is too limited to treat Tongkat Ali as a proven erectile-dysfunction therapy. ³ A later six-month four-arm trial randomized 45 men and reported the strongest erectile-function improvement in the group combining a 200 mg extract with concurrent training. With approximately 11 participants per arm, the study was too small to establish a reliable independent Tongkat Ali effect or confirm a true synergistic effect with exercise. ¹⁰

Stress, mood, and performance

A four-week trial in 63 moderately stressed adults reported changes in selected mood scores, salivary cortisol, and salivary testosterone with a standardized extract; the study was manufacturer-funded. ⁴ A separate randomized 2024 trial had 33 exercise-trained completers and found no between-group differences in body composition, grip strength, mood, or sleep after 400 mg daily for four weeks. Salivary free testosterone and cortisol were assessed in only 22 participants and likewise showed no between-group differences. ⁵ These short studies do not establish a predictable stress, muscle, or performance outcome.

Read the label

The extract mass and the ratio are different fields

Illustrative Tongkat Ali label lines

These examples show what each disclosure can and cannot establish. They are not dosing recommendations or product endorsements.

Tongkat Ali root powder: 500 mg: This states the mass of powdered root. It is not a standardized extract and should not be compared milligram-for-milligram with a concentrated extract.
Root extract: 200 mg, standardized to 1% eurycomanone: Assuming the declaration is accurate, 1% of a 200 mg extract corresponds to approximately 2 mg of eurycomanone per serving. This makes the declared marker exposure calculable, but it does not establish 2 mg as an effective or safe clinical dose, verify the measured content, or prove that the product matches a studied extract. ⁶
200:1 extract: 200 mg; equivalent to 40,000 mg root: The amount in the serving is 200 mg of extract. The 40,000 mg figure is a claimed starting-material equivalent, not 40 g of active compounds in the capsule. A ratio does not reveal eurycomanone, extraction solvent, excipients, or clinical equivalence. See the difference between extracts and powders for more context. ⁷
Branded hot-water root extract: 200 mg: A genuine branded name may help identify the preparation used in a study. The label still needs the actual extract amount and relevant marker information. A brand name or trademark alone does not verify the bottle contents.
Male-performance blend: 1,500 mg: If Tongkat Ali has no separate amount, its contribution cannot be calculated or compared with research. Review how a proprietary blend limits label transparency and consider the other ingredients in the formula.

For the rest of the package, confirm the serving size, servings per day, ingredient order, named plant part, and whether a marker is given as a percentage or an actual amount. The supplement label-reading guide explains how those fields fit together.

What a label cannot confirm

Standardized does not mean clinically interchangeable or proven safe.

A label can disclose species, plant part, actual extract mass, extraction ratio, preparation name, and marker standardization. It cannot independently confirm botanical identity, the measured eurycomanone amount, batch consistency, contaminants, adulterants, or whether the material truly matches a preparation used in a clinical trial.

A larger ratio is not automatically a stronger or better product. The European Medicines Agency guidance for herbal medicinal products defines a drug-extract ratio as the relationship between the quantity of herbal starting material and the resulting preparation and calls for the genuine ratio and extraction solvent to be declared. ⁷ This medicinal-product guidance explains why a ratio alone is incomplete; it is not presented here as a universal dietary-supplement labeling rule. The ratio alone does not establish the chemical profile or biological effect.

Standardization can make one marker more visible and improve batch comparability. It does not prove that the marker is the only relevant constituent, that the printed percentage is accurate, or that the finished product is effective or appropriate for a particular person.

Safety and clinical boundaries

Short trials do not settle long-term or product-wide safety

In 2021, EFSA assessed a specific standardized water extract proposed for supplements at up to 200 mg per day. The applicant’s specification included 0.8% to 1.5% eurycomanone and 40% to 65% glycosaponins. EFSA noted a positive in vitro chromosomal-aberration test and a positive in vivo comet assay at the highest tested dose of 2,000 mg/kg body weight in rat stomach and duodenum. The Panel concluded that the extract had the potential to induce DNA damage and that its safety had not been established under any condition of use. ⁶

That conclusion applies to the assessed extract and application, not automatically to every Tongkat Ali preparation. It also means the proposed 200 mg amount must not be presented as an EFSA-approved safe dose. Conversely, normal laboratory results in a short human trial cannot rule out uncommon effects, long-term effects, or risks from a different extract.

Low-testosterone symptoms: a supplement label cannot diagnose hypogonadism. The Endocrine Society recommends diagnosis only when compatible symptoms or signs occur together with unequivocally and consistently low testosterone measurements, followed by evaluation of the cause. ⁸
Medicines: a small single-dose crossover study in 14 healthy nonsmoking young men administered 80 mg of propranolol together with either placebo or 200 mg of a water extract after an overnight fast. With the extract, propranolol exposure decreased by 29% and peak concentration decreased by 42%. ⁹ The study detected no acute change in its measured pharmacodynamic outcomes in these healthy volunteers. It cannot establish compatibility during chronic use or with other medicines, but it shows why medication compatibility should not be inferred from a supplement label.
Pregnancy and breastfeeding: pregnant and lactating women were excluded from the population proposed in the EFSA application; the cited sources do not establish safety in these groups.
Multi-ingredient formulas: effects cannot automatically be attributed to Tongkat Ali when stimulants, hormones, minerals, or other botanicals are present. A hidden amount also prevents meaningful comparison with research.

The trials and regulatory sources reviewed here do not establish one product-independent Tongkat Ali dose or a tolerable upper intake level. Amounts used in trials belong to specific preparations and protocols and should not be converted into an individual recommendation from this page.

NutriDetector approach

How NutriDetector reads Tongkat Ali labels

NutriDetector looks for the actual listed Tongkat Ali amount, along with any disclosed ratio, named preparation, marker such as eurycomanone, serving size, and blend limitation. Because label wording and OCR can be ambiguous, confirm that the amount captured from the label matches the Supplement Facts panel. An “equivalent to” raw-root figure should not be read as the extract dose.

It does not convert an equivalent-root claim into the actual dose, verify a trademark or certificate, laboratory-test the marker amount, identify contaminants or adulterants, predict testosterone or sexual outcomes, clear medication interactions, or decide whether someone should take the product.

Analyze the full formula

A dramatic ratio should not hide the actual extract.

Review the disclosed form, extract mass, standardization, serving context, blends, and co-ingredients together. Label analysis cannot verify the bottle contents or provide medical clearance.

Analyze a supplement label

Questions and boundaries

Tongkat Ali supplement FAQ

Does Tongkat Ali increase testosterone?

A meta-analysis of five randomized trials found a positive signal for total testosterone, including in the review authors’ subgroup defined by baseline total testosterone below 300 ng/dL. The studies were small and varied in preparation, population, dose, and duration. That research cutoff is not a clinical diagnosis, and the evidence does not establish a guaranteed effect for every product or replace appropriate testing for suspected low testosterone.

Is a 200:1 Tongkat Ali extract stronger or better?

Not necessarily. A 200:1 claim describes a relationship between starting plant material and extract, assuming the ratio is genuine and correctly declared. It does not show the marker profile, extraction solvent, batch consistency, safety, or clinical equivalence. The actual extract milligrams remain the relevant labeled amount.

What does eurycomanone standardization tell me?

It tells you the declared percentage or amount of a named marker in the extract. For example, 1% in a 200 mg extract implies approximately 2 mg of eurycomanone, assuming the label is accurate. This does not establish an effective dose, verify the measured content, prove purity or safety, or show that the product matches a studied extract.

Is 200 mg a proven effective or safe Tongkat Ali dose?

No universal conclusion can be made from that number alone. Some studies used 100 or 200 mg of a particular standardized extract, while other studies used different amounts and preparations. EFSA evaluated an application proposing up to 200 mg per day for one standardized water extract and concluded that its safety had not been established.

What safety concern did EFSA identify?

EFSA noted positive in vitro genotoxicity findings and a positive in vivo comet assay at the highest tested dose of 2,000 mg/kg in rat stomach and duodenum. The Panel concluded that the specific assessed extract had the potential to induce DNA damage and that its safety had not been established under any condition of use. These were not human DNA-damage results and should not be generalized silently to every Tongkat Ali preparation.

Can NutriDetector verify that a Tongkat Ali extract is high quality?

NutriDetector can evaluate what the label discloses, including species, plant part, actual extract mass, ratio, named preparation, marker standardization, serving context, and blend transparency. It cannot authenticate the raw material, verify a certificate, measure eurycomanone, test contaminants or adulterants, or confirm that the bottle matches a clinical-trial product.

Scientific references and safety sources

Leisegang K, Finelli R, Sikka SC, Panner Selvam MK. Eurycoma longifolia (Jack) Improves Serum Total Testosterone in Men: A Systematic Review and Meta-Analysis of Clinical Trials. Medicina. 2022;58(8):1047. PubMed.
Chinnappan SM, George A, Pandey P, Narke G, Choudhary YK. Effect of Eurycoma longifolia standardised aqueous root extract on testosterone levels and quality of life in ageing male subjects: a randomised, double-blind, placebo-controlled multicentre study. Food & Nutrition Research. 2021;65:5647. PubMed.
Kotirum S, Ismail SB, Chaiyakunapruk N. Efficacy of Tongkat Ali (Eurycoma longifolia) on erectile function improvement: systematic review and meta-analysis of randomized controlled trials. Complementary Therapies in Medicine. 2015;23(5):693–698. PubMed.
Talbott SM, Talbott JA, George A, Pugh M. Effect of Tongkat Ali on stress hormones and psychological mood state in moderately stressed subjects. Journal of the International Society of Sports Nutrition. 2013;10:28. PubMed.
Antonio J, Evans C, Pereira F, et al. The Effect of Tongkat Ali Supplementation on Body Composition in Exercise-Trained Males and Females. Applied Sciences. 2024;14(11):4372. DOI.
EFSA Panel on Nutrition, Novel Foods and Food Allergens. Safety of Eurycoma longifolia (Tongkat Ali) root extract as a novel food pursuant to Regulation (EU) 2015/2283. EFSA Journal. 2021;19(12):6937. EFSA.
European Medicines Agency. Guideline on declaration of herbal substances and herbal preparations in herbal medicinal products/traditional herbal medicinal products. Revision 1. EMA/HMPC/CHMP/CVMP/287539/2005. EMA.
Bhasin S, Brito JP, Cunningham GR, et al. Testosterone Therapy in Men With Hypogonadism: An Endocrine Society Clinical Practice Guideline. Journal of Clinical Endocrinology & Metabolism. 2018;103(5):1715–1744. DOI.
Salman SA, Amrah S, Wahab MSA, et al. Modification of propranolol’s bioavailability by Eurycoma longifolia water-based extract. Journal of Clinical Pharmacy and Therapeutics. 2010;35(6):691–696. PubMed.
Leitão AE, Vieira MCS, Pelegrini A, da Silva EL, Guimarães ACA. A 6-month, double-blind, placebo-controlled, randomized trial to evaluate the effect of Eurycoma longifolia (Tongkat Ali) and concurrent training on erectile function and testosterone levels in androgen deficiency of aging males (ADAM). Maturitas. 2021;145:78–85. PubMed.