Urolithin A dosage: the doses the trials actually used

Urolithin A dosing is refreshingly concrete, because the human program used a narrow set of doses and largely stuck to them. The headline is simple: 500 mg or 1,000 mg once daily. The useful detail is which dose did what, why you take the finished compound at all, and what the numbers do — and don’t — prove. For what the compound actually delivers at those doses, read it alongside our urolithin A evidence monograph.

The doses the trials used: 500 mg and 1,000 mg, once daily

The first-in-human study established the range. Over four weeks, daily doses of 500 mg and 1,000 mg were safe and bioavailable, and shifted skeletal-muscle mitochondrial gene expression toward a healthier signature; single doses up to 2,000 mg were also well tolerated.^[1] From there the muscle trials standardized: the middle-aged RCT compared 500 mg and 1,000 mg against placebo,^[2] and the older-adult RCT carried 1,000 mg/day for four months.^[3] So if there is a “trial dose,” it is 1,000 mg once daily — the one dose common to all of them.

Why you supplement it at all

Urolithin A isn’t something you can reliably get from food. It’s a postbiotic: gut bacteria make it from ellagitannins (in pomegranates, walnuts and berries), and many people’s microbiomes barely produce it — which is the entire rationale for taking the finished metabolite rather than eating more pomegranate.^[1] That’s why a standardized dose matters here more than for most compounds: supplementing the pure metabolite (the branded form is Mitopure) bypasses the variable gut conversion and delivers a known milligram amount, which is exactly what the trials relied on to get reproducible blood levels.^[1]

Timing and form

In the trials urolithin A was given once daily by mouth, so there’s no split schedule to manage.^[2][3] It’s a fat-soluble molecule, so taking it with a meal is a sensible way to support absorption — but note that’s practical reasoning, not a separately tested claim. The effects that were measured (mitochondrial gene expression, plasma biomarkers) built over weeks to months of daily dosing, not acutely, so this is a compound you take consistently rather than situationally.^[1][3]

Safety and tolerability

This is the cleanest part of the picture. Across the program, 500–1,000 mg per day for up to four months was safe and well tolerated, with no significant excess of adverse events versus placebo, and single doses up to 2,000 mg raised no safety flags.^[1][3] For a longevity-aisle supplement, that’s an unusually solid tolerability record — the open question is efficacy, not safety.

The honest bottom line

If you reduce it to what the evidence supports: urolithin A was studied at 500 mg or 1,000 mg once daily, by mouth, with 1,000 mg the dose every muscle trial carried, and the whole point of dosing the finished metabolite is to sidestep the gut conversion most people can’t rely on.^[1][2][3] Those doses are safe and reliably nudge endurance and mitochondrial markers — but they are not a proven strength builder and carry no anti-aging outcome proof. Treat it as a well-tolerated supplement dosed the way the trials dosed it, not as a drug with a guaranteed result. For other longevity compounds graded the same honest way, see spermidine; for a peptide dosing comparison, our MOTS-c dosage page follows the same “doses the studies used” approach.