What studies found
A 2022 review of small trials found higher testosterone levels on average, mostly in men who started low. Results in men with normal levels are less clear. Some small studies suggest strength benefits, but none found a benefit for endurance.
How much is in our products
| Product | Amount |
|---|---|
| Fadogia + Tongkat Ali | 400 mg (1% eurycomanone) per 2-capsule serving |
In studies: Small trials used extracts in a range similar to our 400 mg.
Our 400 mg is in the range used in small trials.
Who should take care
Europe's food safety agency noted that tongkat ali root extract may cause DNA damage in animal studies and that its overall safety hasn't been established. Some tongkat ali products have been contaminated with heavy metals or spiked with prescription drugs. Ask first if you have prostate problems or a hormone-related condition, take hormone therapy, or are a drug-tested athlete. It's not for women who are pregnant or breastfeeding.
Talk to your doctor or pharmacist before starting a supplement if you take any medicine, are pregnant or breastfeeding, or have a health condition.
Read more in our guides
Sources
This page is for general education and isn't medical advice. *These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.