Urolithin A dosage and evidence
Written by Aaron CuhaReviewed Sep 2026
The short answer
Urolithin A is a compound your gut makes from pomegranates and berries. In older adults it helped muscle stamina and strength on some tests, and missed on others. It is sold as a supplement.
Evidence grade for Urolithin A: Limited. The rule: people have taken it in a published study, but fewer than 100 of them. The sum on this page: 2 completed trials, none stating how many people. A grade counts how much has been done to people, not whether it works.
- People given it
- 0
- Human studies
- 2
- Found nothing
- 1
Dose
No human dose established
Amounts that were given in studies sit in Human evidence on this page. None of them is a personal dose.
2 completed trials, 0 people given it
4 effects reported, 2 unwanted, 2 wanted, by people using it, not a trial
Goal pages: Muscle and strength
In plain English
In plain English, from Aaron
This is how I would explain it to a friend. The evidence, with the numbers, is further down the page.
Urolithin A is a compound your gut can make from pomegranate and berries. Many people do not make much of it. The pill gives you the compound directly. It is a supplement.
What people take it for
- Stronger muscles as they age.
- Healthier mitochondria, the parts of a cell that make energy.
- A longevity stack item with human trials.
What studies in people showed
The first human test asked if it was safe. It was, and blood and muscle chemistry moved. A later trial in older adults ran for 4 months. Muscle endurance improved. The six minute walk did not. Peak muscle energy did not. In middle aged adults, strength rose about 12 percent. Walking distance and fitness improved too. The one measure the trial named first, peak power, did not. So the file has real human trials and they keep missing the headline measure.
What people report
Reports, not study results
The good
- It is one of the few longevity pills with more than one human trial.
- People say it is easy to take.
The bad
- It is expensive for a result that keeps missing the first named measure.
- Eating pomegranate will not give you a reliable dose. Many guts do not make it.
Where these come from: The trial results are on this page. The price complaint is from longevity forums.
My bottom line
Better evidenced than most of this shelf. Still not a shown way to live longer.
An opinion, not a finding. I am a coach, not a doctor.
What it has been measured to do
Measured in people
Goals Urolithin A has been tested for in people, biggest studies first. We count only what the studies on this page say, so the real numbers may be higher.
- Getting strongerno headcount stated · 2 studies · 1 found nothing
- Lasting longer, staminano headcount stated · 2 studies · 1 found nothing
What people using it report
Real people telling you what happened to them. Nobody checked it, and the people who post are not a fair sample, so it cannot prove anything works. It is still the best guide on this page to what people actually do with Urolithin A, what they expect, and what goes wrong. The full account, including the negative reports, is below.
33 of the 36 indexed goals have no study of any kind behind Urolithin A
No study in people, animals or cells on this page reports a result for these. That does not prove Urolithin A does nothing for them. It does mean anything you have heard about Urolithin A and one of these did not come from a study cited here.
When this earns a spot
It matters as a research compound for the cell's energy parts (mitochondria) and endurance, with studies in people on muscle results. It is not a supplement tied to a blood test. There is no routine test that says you need it.
Bloodwork that belongs beside the bottle
Strength or endurance tests beat a blood panel. No blood test required.
There is no must-do blood test for this one. We say so on purpose.
Test again after about 90 days. If that blood number did not move, stop.
- Do not invent a cell cleanup (mitophagy) blood test from a marketing PDF.
Reading the number
If performance did not change, stop. A normal metabolic panel neither proves nor rules out the bottle.
What people typically order
Nothing on a standard blood panel. What is really in the product still matters. Partners: /guides/supplement-partners.
Show full evidence
What is Urolithin A?
Urolithin A is a compound your gut makes from pomegranates and berries. In older adults it helped muscle stamina and strength on some tests, and missed on others. It is sold as a supplement.
Urolithin A is made by gut bacteria from compounds in pomegranates and berries. Many people's guts do not make much of it. It helps cells recycle their worn-out mitochondria, the parts that make energy. In middle-aged adults, muscle strength rose about 12 percent, but the main power test did not improve. In older adults, four months of it helped a muscle keep working longer, but it did not change how far people could walk in six minutes. It is sold as a supplement called Mitopure.
How does Urolithin A work?
It turns on mitophagy. That is the cell's way of clearing out broken mitochondria, the parts that make energy. The result is a better energy supply, mostly in muscle.
What have studies in people found about Urolithin A?
Three studies in people. All were short. All looked at muscle and cell energy, not at how long people live. It was safe. The main tests of how people function kept missing.
- Middle-aged adults, 2022: muscle strength rose about 12 percent, and fitness and walking distance improved. Peak power, the main test the study named first, did not improve.
- Older adults, 2022: 4 months. Muscle stamina and blood markers improved. Six-minute walk and the muscles' peak energy output were no different from a dummy pill.
- First study in people, 2019: inactive older adults. It was safe, and blood and muscle tests showed signs of healthier mitochondria. Strength and stamina were not measured.
What this does not tell you: No study has asked whether urolithin A changes how long a person lives, or what they die of. When a study misses the test it named first and hits others instead, those other results count for less.
What do people who took Urolithin A report?
This is what real people say happened to them, good and bad. Nobody measured it. A report cannot tell a real effect from the lift people get just from expecting it to work, from a diet or training change made at the same time, or from what was really in the vial. We still put it near the top. It is the next best thing to a study in people: what happens when real people use it, including what goes wrong.
- Discussion volume is low and the accounts diverge rather than converge, so there is no pattern here to report, only a spread.
- The most detailed negative account describes four months of daily use of the branded powder with no change in strength, endurance or power output, and frames the spend of several hundred dollars as wasted. Another describes overwhelming fatigue while taking it. A third describes a clean lift in energy.
- Cost is the recurring objection and is what people cite when they stop.
- Where it appears on health forums it is usually as a posted article or conference summary rather than as anyone's experience, and the comment threads under those posts contain almost no personal use at all, which limits what can honestly be said about it.
Sources: LongeCity supplement threads reached through site-restricted search extracts because that board timed out on direct fetch from this environment, together with ExcelMale threads read directly which turned out to carry article content rather than member experience, September 2026. Nothing above is attributed to any specific post and no post is reproduced.
The evidence, in charts
Fig. 1a · how many people
3studies in people cited, but none says how many people took part
number of people not stated
We do not draw a total, because none of the studies in people on this page gives one. Read the sources below for what each study measured.
We read the number of people from the source lines on this page. Where a line gives no number, we count nothing for it. We do not guess.
Fig. 1b · evidence mix
All 3 sources here are studies in people.
- Study in people · done in people3100%
Counted from the list of sources on this page. It counts only what we cite, so there may be more studies out there. A review counts once, however many studies it sums up.
Fig. 2 · evidence over time
Sources here come from just two years, 2019 and 2022.
Too few different years on this page to draw a timeline.
Fig. 3 · legal status at a glance
US
Not approved
UK
Not approved
AU
Not approved
CA
Not approved
Not approved in any of the four countries shown. This is what the law says, not a verdict on the science. See Legal status below for the full text and any notes.
Fig. 4 · how much does what
Nobody has tested different amounts in people
This chart would show how the effect changes as the amount goes up. For this compound, nobody has measured that in people. So we leave it empty. We will not borrow an animal chart and pretend it works the same in people.
Fig. 5 · what the molecule is
- Kind of compound
- Supplement
- Molecule weight
- 228.2 Da
- Half-life
- Stated in words, not a numbersee the exact wording below
- Chain length
- None on file
No amino acid sequence is on file for Urolithin A, which is expected: a supplement is not built from amino acids.
The studies we cite
- Study in people2019The mitophagy activator urolithin A is safe and induces a molecular signature of improved mitochondrial and cellular health in humans
The first human test asked whether it was safe and whether the body showed any sign of it working. Sedentary older adults took it, tolerated it, and their blood and muscle showed chemical patterns pointing to healthier mitochondria, the parts of a cell that make energy. Nothing about strength, stamina or how anybody felt was measured here.
First-in-human trial in sedentary elderly adults: safe, with plasma and muscle signatures of improved mitochondrial health.
- Study in people2022Effect of urolithin A supplementation on muscle endurance and mitochondrial health in older adults: a randomized clinical trial
Four months of it improved muscle endurance and blood chemistry, and left the headline measures untouched. Older adults took the supplement or a dummy. How far they could walk in six minutes did not differ, and neither did the peak energy their muscles could produce. What improved was how long a muscle could keep going, plus several markers. A genuine result, and a narrow one.
4 months of urolithin A improved muscle endurance and plasma biomarkers, though 6-minute walk and peak ATP did not differ from placebo.
- Study in people2022Urolithin A improves muscle strength, exercise performance, and biomarkers of mitochondrial health in a randomized trial in middle-aged adults
Strength improved, and the trial still missed the thing it was built to show. Muscle strength in middle-aged adults rose about 12 percent, and fitness and walking distance improved as well. But peak power, the one measure chosen before the trial began, did not. When a study misses the measure it named first and hits others instead, those others carry less weight.
About 12% gain in muscle strength and improved VO2 peak and 6-minute walk, though the primary peak-power endpoint was not met.
Common questions
Has Urolithin A been tested in people?
Yes. 0 people given it across 2 completed trials cited here, 1 of which found nothing. Urolithin A is a compound your gut makes from pomegranates and berries. In older adults it helped muscle stamina and strength on some tests, and missed on others. It is sold as a supplement.
What is the Urolithin A dosage?
No human dose established. Amounts that were given in studies sit in Human evidence on this page. None of them is a personal dose. 2 completed trials, 0 people given it
Is Urolithin A FDA-approved?
Sold as a supplement (generally recognized as safe, or GRAS); not an approved drug
Can I just eat pomegranate instead?
Only some people's gut bacteria turn pomegranate compounds into urolithin A well. That is why studies give it directly, so everyone gets the same dose.