Urolithin A: Uses, Benefits, Dosage & Safety
Last updated: June 2026 · Reviewed by the FactoWiki Editorial Team for clarity and source accuracy
Quick summary
Urolithin A is a compound the gut makes from pomegranate/ellagitannins, studied for mitochondrial and muscle health via 'mitophagy'. It's a genuinely novel area, with early but encouraging human data.
What is Urolithin A?
Urolithin A is a metabolite produced by gut bacteria from ellagitannins found in pomegranate, walnuts and berries. Not everyone's gut makes it efficiently, which is why it's now sold directly as a supplement for cellular energy, muscle and 'healthy ageing'.
What Urolithin A is commonly used for
In supplements, Urolithin A is most often included for skin & anti-aging support. It is used as nutritional support, not as a treatment for any medical condition — the distinction matters, because the claims on a sales page are often stronger than the evidence allows.
How Urolithin A works
Urolithin A appears to stimulate 'mitophagy' — the recycling of damaged mitochondria — improving the quality of cells' energy machinery, particularly in muscle. This is a distinctive, well-defined mechanism compared with generic antioxidants.
What the evidence says
Here's an honest snapshot of what published research suggests about Urolithin A — including where the evidence is limited.
- Early human trials suggest urolithin A can improve mitochondrial and muscle markers and possibly muscle endurance in older or less-active adults. (PubMed research)
- The research is still early-stage, so long-term and broader benefits are not yet established. (PubMed research)
Typical dosage used in studies
Human studies have used roughly 500-1,000 mg/day of the supplement form. This is research information for context, not a recommendation — confirm what's appropriate for you with a healthcare professional.
Side effects and safety
Appears well tolerated in trials to date; long-term safety data are still limited.
Medication interactions and who should avoid Urolithin A
Medication & safety check
Low known interaction risk so far; as a newer compound, caution and medical advice are sensible if you take medication.
This is general information, not personal medical advice. If you take any medication, confirm it's safe to combine with Urolithin A with your doctor or pharmacist first.
Sources & further reading
The summary above is drawn from peer-reviewed research and authoritative references. For general, authoritative background you can also consult:
- PubMed research on Urolithin A
- NIH Office of Dietary Supplements
- NIH National Center for Complementary and Integrative Health
- MedlinePlus (U.S. National Library of Medicine)
Frequently asked questions
What is urolithin A?
A gut-derived compound from pomegranate/ellagitannins, studied for mitochondrial and muscle health.
What is mitophagy?
The cellular recycling of damaged mitochondria, which urolithin A appears to stimulate.
Why not just eat pomegranate?
Not everyone's gut bacteria convert ellagitannins to urolithin A efficiently, so direct supplements bypass that.
Is urolithin A proven?
Early human data are encouraging, but it's still an emerging area.
Related ingredients to explore
Ingredients often studied or formulated alongside Urolithin A — useful for understanding the full picture of a formula.