Herbal Extract
Tongkat Ali (Longjack) Extract
Also known as: Eurycoma longifolia, Longjack, LJ100, Pasak bumi
Tongkat Ali is a traditional Southeast Asian herb studied for potential effects on testosterone levels, sexual function, and exercise performance. Evidence suggests modest benefits in specific populations, particularly men with low testosterone, but results are mixed and often limited to branded extracts.
Last reviewed June 2026 · Evidence graded from peer-reviewed research, not editorial opinion. Educational only — not medical advice.
Every Tongkat Ali (Longjack) Extract product we have scored
| # | Product | Score | Per serving |
|---|---|---|---|
| 1 | Transparent Labs Tongkat Ali | 91 A | $0.50 |
| 2 | Nutricost Tongkat Ali Capsules | 87 A | $0.27 |
| 3 | Nootropics Depot Eurycomax Capsules | 86 A- | $2.17 |
| 4 | Gorilla Mind Sigma | 85 A- | $0.83 |
| 5 | NOW Foods Testo Jack 200 | 83 A- | $0.57 |
| 6 | NOW Foods TestoJack 100 | 83 A- | $0.53 |
| 7 | Nootropics Depot Tongkat Ali Extract Capsules or Tablets | 80 A- | $0.67 |
| 8 | Double Wood LJ-100 Tongkat Ali Supplement | 78 B+ | $0.33 |
| 9 | Bluebonnet Nutrition INTIMATE ESSENTIALS FOR HIM TESTOSTERONE & LIBIDO BOOST | 66 B- | $1.93 |
Scored on dose accuracy, form, label transparency and third-party testing. Per-serving cost is list price divided by servings per container. No brand pays to be listed or ranked.
Common questions
How much Tongkat Ali (Longjack) Extract should I take?
The typical range is 200-600 mg daily (of standardized extract). Studies typically show effects after 4-12 weeks of consistent use; some effects may require 8+ weeks
When should I take Tongkat Ali (Longjack) Extract?
With meals for better absorption. Recommended; fat-soluble compounds benefit from food.
Which form of Tongkat Ali (Longjack) Extract is best?
Powder extract. Other forms in the catalog: Capsule, Tablet, Standardized extract.
Is Tongkat Ali (Longjack) Extract safe?
Commonly reported: Insomnia or sleep disturbances (especially if taken late in day), Mild headache, Restlessness or increased heart rate, Gastric upset (rare).
Which Tongkat Ali (Longjack) Extract supplement scores highest?
Transparent Labs Tongkat Ali, at 91/100. Scored on dose accuracy, form, label transparency and third-party testing — no brand pays to be listed or ranked.
Primary uses
- Testosterone support
- Sexual function and libido
- Exercise performance and muscle gains
- Male fertility support
- Energy and vitality
How it works
- May increase luteinizing hormone (LH) signaling
- Potential aromatase inhibition
- Antioxidant and anti-inflammatory activity
- Possible effects on cortisol metabolism
Dosage
- Typical range
- 200-600 mg daily (of standardized extract)
- Timing
- With meals for better absorption
- With food
- Recommended; fat-soluble compounds benefit from food
- Duration
- Studies typically show effects after 4-12 weeks of consistent use; some effects may require 8+ weeks
- Special populations
- Most evidence in men; limited safety data in women and individuals under 18
Forms
- Powder extract· 70/100
- Capsule· 70/100
- Tablet· 70/100
- Standardized extract· 70/100
Safety
Common side effects
- Insomnia or sleep disturbances (especially if taken late in day)
- Mild headache
- Restlessness or increased heart rate
- Gastric upset (rare)
Contraindications
- Pregnancy and lactation (insufficient safety data)
- Hormone-sensitive conditions (breast, prostate cancer)
- Uncontrolled hypertension
- Use with caution in individuals with sleep disorders
Products containing Tongkat Ali (Longjack) Extract
Top-scoring supplements in our catalog that list Tongkat Ali (Longjack) Extract on the label. Each product is graded on Formulate's ingredient-level rubric — dose accuracy, form, transparency, and third-party testing.
Evidence notes
Moderate evidence from multiple RCTs showing benefits for testosterone in hypogonadal men and sexual function in some populations. Benefits for athletic performance less clear. Quality varies significantly by extract standardization; most positive studies use specific branded extracts (LJ100). Evidence is weaker in normotestosterolemic men.
Grade B: Some human trials support key claims; further confirmation needed.
Related in Herbal Extract
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Medical disclaimer. This page is educational and does not replace advice from a qualified healthcare provider. Individual needs and risks vary — consult a professional before starting, stopping, or combining supplements, especially if you are pregnant or nursing, taking medication, or managing a health condition.