Ingredient guide
Urolithin A: evidence, dose and safety
Urolithin A is made by some gut bacteria from ellagitannins in pomegranates, berries and walnuts; many people make little of it. It is not authorised as a novel food in the EU, so we sell it only in the US.
At a glance
- Strongest evidence
- D Weak
- Adult upper limit
- 1000 mg a day from food and supplements together
- Safety checks
- 1 situation and 0 medicine or supplement interactions, checked against your answers in every plan
- Reviewed
- Atrum Labs clinical team (MD, PhD), November 2026
What the research looked at
Each line is one body of research, graded A (strong) to D (weak). How we grade evidence. What each study measured is explained in your personal plan.
| Grade | Who was studied | References |
|---|---|---|
| D | Adults 40-90 |
|
How much
- Adult upper limit: 1000 mg a day from food and supplements together. Source: Highest dose in 4-month trials (Liu S et al. JAMA Netw Open 2022); US FDA GRAS notice GRN 791.
- Children's doses are set by age, and some ingredients are for adults only.
Who should not take it, or should check first
- Not suitable. No safety data in pregnancy or breastfeeding; trials enrolled adults 40-90.
Where we sell it
- Not sold in Sweden.
Written and reviewed by the Atrum Labs clinical team (physician-scientists, MD, PhD) from our clinical knowledge base, version 0.2.0-draft. This page is general information, not medical advice. Food supplements are not a substitute for a varied, balanced diet and a healthy lifestyle.
See if it belongs in your plan