Tongkat Ali (Eurycoma longifolia) is an adaptogenic botanical studied for its effect on cortisol, a stress hormone that can suppress testosterone production when chronically elevated, as well as for direct support of healthy testosterone levels.
Clinical Summary
A 6-month randomized, double-blind, placebo-controlled trial found Tongkat Ali increased testosterone levels in nearly half of participants with androgen deficiency of aging, with larger gains when combined with resistance training; a separate 12-week multicenter study found improved testosterone and quality-of-life scores versus placebo.
Dosage Guidelines
200mg daily of a standardized extract.
Safety & Side Effects
Generally well tolerated; mild insomnia or restlessness reported occasionally.
Known Interactions
May have additive effects with other testosterone-support ingredients or hormone-related medications; consult a physician if on hormone therapy.
Medical Disclaimer
The information provided in this clinical review is for educational and informational purposes only. It is not intended to be a substitute for professional medical advice, diagnosis, or treatment.
*These statements have not been evaluated by the Food and Drug Administration (FDA). This product or ingredient is not intended to diagnose, treat, cure, or prevent any disease.
Always consult your physician or other qualified health provider with any questions you may have regarding a medical condition, or before beginning any new diet, fitness, supplement, or treatment regimen, especially if you have pre-existing medical conditions or are taking prescribed medications.
