Best Natural Supplements for ED: Evidence and Safety Warnings
Korean red ginseng and L-citrulline have small studies for mild ED; many 'male enhancement' products hide prescription drugs. See what's safe and what works.
By the editorial team · Updated Oct 14, 2026 · 4 sources cited
The best supplements for ED have modest evidence at most. A Cochrane review found ginseng may slightly improve erectile function, with low certainty. L-citrulline improved erection hardness in a small trial of men with mild ED. Many 'male enhancement' supplements have been found to contain hidden prescription drugs, which can be dangerous. Proven medicines work far better.
Evidence-ranked options
| Supplement | Evidence | Typical dose | Notes |
|---|---|---|---|
| Korean red ginseng | C | As studied (often 1,000 mg 3 times a day) | Small effects; may interact with blood thinners and diabetes medicines. |
| L-citrulline | C | 1.5 g a day in a small trial | Mild ED only; limited data. |
| 'Male enhancement' blends | D | Avoid | FDA frequently finds hidden sildenafil or tadalafil. |
A: strong · B: moderate · C: limited or mixed · D: good evidence of no benefit. See the evidence database.
What helps most
- See a doctor: ED can signal diabetes, heart disease or hormone problems
- Exercise, weight loss, not smoking and limiting alcohol all improve erectile function
- Prescription medicines are effective and safe for most men
Related: libido supplements and testosterone.
Ingredient guides
Frequently asked questions
Is ED a sign of heart disease?
It can be. ED shares risk factors with heart disease, so it's worth a check-up.
Why are hidden drugs in supplements dangerous?
Undeclared sildenafil-type drugs can dangerously lower blood pressure in men taking nitrates for heart conditions.
Sources
Educational content, not medical advice. Read our medical disclaimer.