ResearchSafe

Urolithin A (Urolithin A (Mitophagy Activator))

Category: Anti-Aging. Status: Dietary compound (clinical studies).

A gut-microbiome metabolite of ellagitannins (found in pomegranates, walnuts, and berries) that many people cannot produce on their own. Studied for improving mitochondrial health and muscle function by triggering mitophagy.

How it works

Stimulates mitophagy - the selective recycling of damaged mitochondria - improving mitochondrial quality and energy efficiency in muscle and other tissues.

Key facts

  • Molecular weight: 228.20 Da
  • Half-life: Several hours
  • Bioavailability: Oral; bypasses the need for the gut bacteria many people lack
  • Storage: Keep cool, dry, and sealed.

Dosing overview

  • Typical dose: 500-1000 mg per day
  • Frequency: Once daily
  • Duration: Ongoing (8+ weeks for muscle effects)
  • Route: Oral

Protocol notes

  • Clinical work commonly used 500-1000 mg once daily.
  • Muscle endurance benefits appeared over ~2-4 months of consistent use.
  • Taken with food is fine; consistency matters most.

Reported benefits

  • Improves mitochondrial function (mitophagy)
  • Increased muscle endurance
  • Cellular energy support
  • Studied for healthy aging

Possible side effects

  • Generally well tolerated
  • Mild GI effects (uncommon)

Research

  • Urolithin A improves muscle endurance (2022): Randomized trial reported improved muscle endurance and mitochondrial biomarkers in middle-aged adults.
  • Urolithin A safety and mitophagy (2019): First-in-human study showed it was safe and engaged mitochondrial gene expression.

Community reviews of Urolithin A

Rated 5 out of 5 from 3 community reviews by ResearchSafe members.

  • bio_optimal rated it 5/5 - Genuinely effective after 1 month: Been using Urolithin A for about 1 month and the results are clear. Not overnight dramatic, but a steady, consistent improvement that became undeniable by the end of the first month. The mechanism makes sense based on what I have read in the literature, and my subjective experience matches the expected timeline. Benefits built gradually and plateaued at a good level. Side effects were minimal to none at the dose I used. Followed proper protocols for sourcing, storage, and administration. Would recommend to others who have done their research and have realistic expectations.
  • protocol_pete rated it 5/5 - Noticed clear benefits within weeks: Added Urolithin A to my protocol about 4 months ago and it has earned its place. The benefits became noticeable around week 2-3 and have been consistent since. What I appreciate about this compound is the predictability. It does what the research suggests it should do, at roughly the timeline you would expect. No surprises, no dramatic swings, just steady improvement. No notable side effects to report at my dose. Sourcing is always the challenge with research compounds, insist on third-party testing. Storage and reconstitution per standard protocols. Plan to continue.
  • peptide_sarah rated it 5/5 - Worth adding to the protocol: Urolithin A has been a worthwhile addition. I am data-driven and tracked relevant markers before, during, and after. The improvement is measurable and correlates with the intervention timeline. What sets this apart from some compounds I have tried is the consistency. Benefits did not fluctuate wildly or disappear. They built up and maintained. That gives me confidence in the mechanism. Tolerance has been excellent. Nothing in my bloodwork or subjective experience raised any flags. This is the kind of compound that does its job quietly without causing problems. Exactly what you want.

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Community discussions about Urolithin A

Research and educational reference only. Not medical advice.