Quick answer: Small trials of Tongkat Ali (Eurycoma longifolia), often 200 to 400 mg of extract daily, reported modest rises in testosterone, mainly in men with low levels or high stress. Studies are small and many are industry-funded. Quality varies, and some products have tested positive for heavy metals.
What it is
A Southeast Asian shrub root, used traditionally for vitality.
The evidence
Reviews of small randomized trials suggest modest effects on testosterone and mood under stress. Effects in men with normal levels are less clear.
Cautions
- Hormone-sensitive conditions, including prostate cancer
- Possible interaction with diabetes and blood pressure medicines
- Product contamination: choose tested brands
Low testosterone is a medical diagnosis. If you have symptoms, ask your doctor for a blood test.
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General information, not medical advice. Maxentra is a dietary supplement and is not intended to diagnose, treat, cure or prevent any disease.