Tongkat Ali, derived from the root of Eurycoma longifolia, is a traditional Southeast Asian botanical that has gained considerable attention in modern research. Studies indicate that it may help support healthy testosterone levels, particularly in men experiencing age-related decline or mild hormonal imbalances, and research suggests it may also play a role in reducing perceived stress by modulating cortisol levels. Several clinical trials have explored its potential to improve energy, reduce fatigue, and support overall vitality, with some promising findings related to physical endurance and mood. While the body of evidence continues to grow, Tongkat Ali remains one of the more well-studied herbal supplements in its category, though individual responses can vary and more large-scale research is still welcomed by the scientific community.
Compare this supplementResearch suggests that Tongkat Ali (Eurycoma longifolia) may support testosterone levels in men, with evidence coming...
View studies →Research suggests that Tongkat Ali may support energy-related outcomes by promoting more consolidated wakefulness dur...
View studies →Research suggests that Tongkat Ali is recognized within the broader category of adaptogens — botanicals traditionally...
View studies →These are commonly referenced dosage ranges for this supplement. They are not medical recommendations. Always consult a healthcare provider before supplementing.
| Form | Dose range | Frequency | Studied for | Source |
|---|---|---|---|---|
| Capsule | 300 mg | Daily | General health and testosterone support in aging men | Dose used in trials with older male subjects examining late-onset hypogonadism |
| Extract | 400 mg | Daily | Energy, fatigue reduction, and physical performance | Used in clinical trials examining ergogenic and anti-fatigue effects |
| Extract | 200–400 mg | Daily | Stress relief and cortisol modulation | Range used in studies assessing hormonal stress markers including cortisol and testosterone ratio |
| Extract | 200 mg | Daily | Testosterone support and male reproductive health | Most commonly used dose in RCTs; standardized water-soluble extract (e.g., Physta) |