Urolithin A is a compound your gut bacteria make from ellagitannins in pomegranate, walnuts and berries, and it is marketed as a way to help cells clear out worn-out mitochondria. Supplements skip the gut step and give you the finished molecule. The catch is that almost all the human research used one branded ingredient, Mitopure, mostly in trials its maker funded, and independent label tests have found products far off their stated dose.

So this ranking rewards what you can check: whether the product uses the trial ingredient, whether someone independent confirmed what is in it, the price per 500 mg, how much else is mixed in, and how far the marketing outruns the trials. We read the printed label on every product below and scored all eight on the same five criteria. For the background, see our urolithin A explainer.

The short version

  • Best overall: Timeline Mitopure Softgels, the trial ingredient at 500 mg, NSF Certified for Sport, but about $3.30 a day.
  • Best value: Codeage Liposomal Urolithin A, 500 mg and NSF/ANSI 173 listed, though its source is not Mitopure and the Amazon price may not last.
  • Best lab-verified alternative: ProHealth, with a named-lab certificate showing 510 mg per serving.
  • The trials are mixed. The largest trials, in older adults, middle-aged adults and elite runners, missed their main outcomes; gains showed up in some secondary lab tests.
  • Mostly company-funded. 6 of the 10 oral trials we reviewed were sponsored or funded by Mitopure's maker, and the two fully independent trials missed their main outcomes.
  • Label accuracy varies. An independent test found labeled urolithin A products ranging from 15.5 percent under to 28.6 percent over their claims.
  • Pomegranate extract is not urolithin A. Many people make little or none from food, and a pomegranate product is not a substitute for the finished compound.
Disclosure: NutraSmarts is reader-supported. We may earn an affiliate commission when you buy through links on this page, at no extra cost to you. It never changes our rankings, and no brand paid to be featured or sent us product. As an Amazon Associate we earn from qualifying purchases. See our affiliate disclosure.

How we ranked them

Every product here sells the same molecule at a similar dose, so we scored what separates them:

Scores are rounded to one decimal. Chewable and powder versions of Mitopure are covered below, along with two products we do not recommend. No brand paid to be included, and none sent product.

What urolithin A trials actually show

What the trials measured. The first human trial, in older adults, found urolithin A safe at single doses up to 2,000 mg and saw changes in blood and muscle markers after four weeks. The headline trials came next. In 66 adults aged 65 to 90, 1,000 mg a day for four months did not significantly improve the main outcomes, six-minute walk distance and muscle energy production; hand and leg endurance was better than placebo at two months, but by four months the placebo group had caught up and the difference was not significant. In 88 overweight middle-aged adults, the main outcome, peak power, did not improve significantly; hamstring strength rose about 12 percent on 500 mg, a significant difference from placebo, partly because strength fell in the placebo group, and gains in walking distance and peak oxygen uptake were not significant against placebo.

Other trials. In 42 elite runners, four weeks at 1,000 mg did not significantly improve a 3,000 m time trial, though perceived effort and a muscle-damage marker were lower. In 50 middle-aged adults, four weeks shifted some immune-cell markers. Two small trials reported gains on some tests: 20 resistance-trained men improved repetitions to failure but not their one-rep maximums, and a single-blind pilot in 20 teenage soccer players met its main endurance test by a narrow margin. The two fully independent trials missed their main outcomes: 50 adults with obesity showed no significant change in blood-vessel function, and a 10-patient heart trial found no significant change in heart measures. A 2026 meta-analysis could pool only one outcome, the six-minute walk, and found no significant difference.

Who funded them. Of the 10 oral trials we reviewed, 6 were sponsored or funded by Amazentis, which makes Mitopure, and most included its employees as authors. Every outcome measured in the published trials we found is a lab or performance test; none looked at falls, frailty, infections or heart events.

Making your own. How much urolithin A your gut makes depends on your bacteria, and the estimates depend on the definition: in a sponsor-funded study, only 12 percent of adults had detectable urolithin A at the start and about 40 percent converted a glass of pomegranate juice into meaningful amounts, while other studies put the share who make none at all at 5 to 25 percent. In that study, 500 mg of urolithin A gave more than six times the exposure of the juice. In a separate trial of pomegranate extract, 6 of 20 people never produced urolithin A at all.

Regulatory status and label accuracy. Mitopure's maker filed a GRAS notice (GRN 791) for urolithin A in foods such as protein shakes and yogurt, up to 500 or 1,000 mg per serving, and FDA replied in December 2018 that it had no questions; that is not approval and does not cover health claims. We found no other urolithin A GRAS notice and no new dietary ingredient filing. In an independent 2024 test, labeled urolithin A products ranged from 15.5 percent under to 28.6 percent over their claims, and testing commissioned by Mitopure's maker reported no urolithin A in two Amazon products.

The 8 best urolithin A supplements

Tap any product to jump straight to its full review.

#1Timeline Longevity Supplement Mitopure urolithin A softgel pouch
Best Overall

Timeline Mitopure Urolithin A Softgels

4.1 / 5

Best for: People who want the trial ingredient with NSF Certified for Sport

Urolithin A per day
500 mg
2 softgels
Source
Mitopure
the trial ingredient
Other actives
None
Independent cert.
NSF Sport + 173
Verified on NSF site
Servings
30
Cost per 500 mg
$3.30

The top pick because it is the trial ingredient with the strongest verification: 2 softgels give 500 mg of Mitopure with nothing else added, and the softgels are NSF Certified for Sport and NSF/ANSI 173 listed, both confirmed on NSF's sites. The trade-offs are cost, about $3.30 a day for a dose half of what most trials used, and marketing that runs ahead of the research: "clinically proven to change how cells age", organ icons for the heart, brain and immunity, a #1 doctor-recommended survey claim, and an unsupported claim that mitochondrial function declines from age 30.

Pros
  • Mitopure, the urolithin A used in nearly all published trials and the only one with an FDA GRAS notice
  • NSF Certified for Sport and NSF/ANSI 173, both confirmed on NSF's sites
  • 500 mg in 2 softgels with nothing else added
  • More than 1,000 Amazon ratings averaging 4.5 stars
Cons
  • About $3.30 a day, the most expensive single-ingredient option here
  • Trials more often used 1,000 mg, which would double the cost
  • Its maker funded most of the trials it cites, and the largest ones missed their main outcomes
  • The listing says it is "clinically proven to change how cells age" and shows heart, brain and immunity icons
Check price on Amazon →$99.00 for 60 softgels, 30 servings · seen October 19, 2026
#2Codeage Liposomal Urolithin A 60 vegetable capsule bottle
Best Value

Codeage Liposomal Urolithin A

4.0 / 5

Best for: A lower price with an NSF/ANSI 173 listing

Urolithin A per day
500 mg
2 capsules
Source
Not named
non-Mitopure
Other actives
None
phospholipid carrier
Independent cert.
NSF/ANSI 173
Verified on NSF site
Servings
30
Cost per 500 mg
$0.80 to $2.33
Amazon vs list

The best value: 500 mg of urolithin A in 2 capsules, with an NSF/ANSI 173 listing confirmed on NSF's site, which means the label amount is independently checked. Even at the brand's own $69.99 list price it costs less per 500 mg than Mitopure, and the Amazon price on October 19 was $23.95. It ranks second because the urolithin A source is not named and is not Mitopure, the listing is new with no ratings, and the phospholipid carrier has no evidence of better absorption.

Pros
  • Listed under NSF/ANSI 173, which includes checking the label amount; we confirmed it on NSF's site
  • 500 mg of urolithin A with no other actives
  • Far cheaper than Mitopure, even at the brand's own $69.99 list price
  • A plain listing without longevity or organ claims
Cons
  • The urolithin A source is not named; it is not Mitopure, the ingredient used in the trials
  • A new listing with no Amazon ratings yet
  • The $23.95 Amazon price is about a third of the brand's list price and may not last
  • The phospholipid carrier has not been shown to improve urolithin A absorption
Check price on Amazon →$23.95 on Amazon (codeage.com lists $69.99) for 60 capsules, 30 servings · seen October 19, 2026
#3ProHealth Longevity Full Spectrum Urolithin A 60 capsule bottle
Best Lab-Verified Alternative

ProHealth Full Spectrum Urolithin A

3.7 / 5

Best for: Buyers who want to see a named lab's test result

Urolithin A per day
500 mg
2 capsules
Source
StanYouth
non-Mitopure
Other actives
2
pomegranate, grape
Batch result shown
510 mg
Qalitex lab
Servings
30
Cost per 500 mg
$2.44

The best-verified non-Mitopure option after Codeage: its listing shows a certificate of analysis from a named lab, Qalitex, measuring 510 mg of urolithin A per 2-capsule serving in January 2026. It uses StanYouth urolithin A plus pomegranate and muscadine grape extracts, at about $2.44 a day. It loses points for a non-trial ingredient, no NSF listing, and a claim that about 60 percent of people lack the bacteria to make urolithin A, citing a study that measured conversion after one glass of pomegranate juice rather than missing bacteria.

Pros
  • Shows a certificate of analysis from a named lab, Qalitex, measuring 510 mg of urolithin A per serving (January 2026)
  • 500 mg of urolithin A per serving
  • Adds 250 mg of Pomanox pomegranate extract and 100 mg of muscadine grape extract
Cons
  • StanYouth urolithin A is not Mitopure, the ingredient used in the trials
  • About $2.44 a day
  • Says "approximately 60% of people lack the gut bacteria" to make urolithin A, citing a sponsor study that measured conversion after one glass of pomegranate juice, not missing bacteria
  • We found no NSF listing for it
Check price on Amazon →$73.12 for 60 capsules, 30 servings · seen October 19, 2026
#4Toniiq Urolithin A Complex 90 capsule jar
Best Budget Pick

Toniiq Urolithin A Complex

3.4 / 5

Best for: The lowest daily cost, if an unnamed lab is acceptable

Urolithin A per day
500 mg
3 capsules
Source
Not named
claims 99.4% purity
Other actives
3
pomegranate, NMN, PHGG
Independent cert.
Unnamed COA
No named lab
Servings
30
Cost per 500 mg
$1.17

The cheapest product here at about $1.17 a day for 500 mg of urolithin A, with pomegranate extract, 100 mg of NMN and prebiotic fiber added. It ranks lower because its certificate-of-analysis image names no lab and says full results are available on request, the source is not named, and the extras were not part of the urolithin A trials. The listing also compares its "elevated" urolithin A with unnamed other brands.

Pros
  • About $1.17 a day for 500 mg of urolithin A
  • Also includes 500 mg pomegranate extract, 100 mg NMN and 400 mg of PHGG fiber
  • Lists every amount, with no proprietary blend
Cons
  • Its certificate-of-analysis image names no lab and says full results are available on request
  • The urolithin A source is not named and is not Mitopure
  • Three capsules a day, and the extras were not part of the urolithin A trials
  • Compares its "elevated" urolithin A purity with unnamed other retail brands
Check price on Amazon →$34.97 for 90 capsules, 30 servings · seen October 19, 2026
#5PlantFusion Vegan Urolithin A 500 mg 60 capsule bottle
Best One-a-Day Capsule

PlantFusion Urolithin A 500 mg

3.3 / 5

Best for: One capsule a day

Urolithin A per day
500 mg
1 capsule
Source
Not named
claims 98% or higher
Other actives
1
pomegranate 50 mg
Independent cert.
Unnamed claim
No named lab
Servings
60
Cost per 500 mg
$1.83

The simplest way to take 500 mg, in one capsule a day, at about $1.83. It says it publishes finished-product test results online, but neither the listing nor the brand's product page shows them or names a lab. It also says 500 mg matches the dose in most human studies, when most trials used 1,000 mg, ties urolithin A to NAD and NADH cycling, which the trials did not study, and compares itself with other labels and companies.

Pros
  • One capsule a day gives 500 mg of urolithin A
  • A two-month bottle at about $1.83 a day
  • Says it publishes finished-product test results online
Cons
  • Its test results are not shown on the listing or the brand's product page, and no lab is named
  • Says 500 mg matches the dose "used in most human clinical studies"; most trials used 1,000 mg
  • Ties urolithin A to "NAD and NADH cycling", which the trials did not study, and compares itself with other labels
  • The urolithin A source is not named and is not Mitopure
Check price on Amazon →$109.97 for 60 capsules, 60 servings · seen October 19, 2026
#6Pure Elements Urolithin A plus NAD Complex 60 capsule bottle
Best NAD Combination

Pure O Elements Urolithin A + NAD Complex

3.1 / 5

Best for: People who also want NAD in the same capsule

Urolithin A per day
500 mg
2 capsules
Source
Not named
97%
Other actives
3
NAD, resveratrol, CoQ10
Independent cert.
Unnamed claim
No named lab
Servings
30
Cost per 500 mg
$2.00

A combination of 500 mg urolithin A with 500 mg NAD, 150 mg Japanese knotweed extract (about 75 mg trans-resveratrol) and 100 mg CoQ10 for about $2.00 a day. It loses points for a title that says "Urolithin A 1000mg" when the label gives 500 mg of urolithin A, for liposomal absorption and focus claims, and for a testing claim that names no lab.

Pros
  • 500 mg of urolithin A plus 500 mg NAD, 150 mg Japanese knotweed extract (about 75 mg trans-resveratrol) and 100 mg CoQ10
  • About $2.00 a day for the combination
Cons
  • The title says "Urolithin A 1000mg", but the label gives 500 mg of urolithin A; the 1,000 mg counts NAD too
  • Claims liposomal "enhanced bioavailability" and focus benefits that no urolithin A trial has shown
  • "3rd party tested" names no lab
  • The urolithin A source is not named and is not Mitopure
Check price on Amazon →$59.99 for 60 capsules, 30 servings · seen October 19, 2026
#7Revive Longevity Core 90 vegetarian capsule jar
Best Multi-Ingredient Stack

Revive Longevity Core

3.0 / 5

Best for: People who want an all-in-one longevity stack

Urolithin A per day
500 mg
3 capsules
Source
Not named
Other actives
5
rhodiola, CoQ10, more
Independent cert.
Unnamed claim
No named lab
Servings
30
Cost per 500 mg
$2.50

A six-ingredient longevity stack built around 500 mg of urolithin A with rhodiola, CoQ10, apigenin, PQQ and black pepper extract, at about $2.50 a day. Every amount is listed, but its third-party testing claim names no lab, it has only 8 ratings, it claims enhanced absorption from BioPerine, and it lists less fatigue and sharper focus among benefits felt in the first weeks, which no urolithin A trial has shown.

Pros
  • 500 mg of urolithin A with 200 mg rhodiola, 100 mg CoQ10, 50 mg apigenin and 15 mg PQQ
  • Every amount is listed, with no proprietary blend
Cons
  • Says it is third-party tested but names no lab and shows no certificate
  • Lists less fatigue and sharper focus among benefits "felt in the first weeks", which no urolithin A trial has shown
  • Five other actives, so you cannot tell what any one does
  • Only 8 Amazon ratings
Check price on Amazon →$74.99 for 90 capsules, 30 servings · seen October 19, 2026
#8Pure Encapsulations Renual 60 Caplique capsule bottle
Best Mitopure Combination

Pure Encapsulations Renual

2.8 / 5

Best for: Pure Encapsulations fans who want Mitopure at a lower dose

Urolithin A per day
250 to 500 mg
2 capsules, 1 to 2 times
Source
Mitopure
Other actives
2
resveratrol, CoQ10
Independent cert.
None found
Servings
15 to 30
Cost per 500 mg
$5.27

The only other Mitopure product we found, from a long-established brand with a restrained listing. The problem is the dose: 2 capsules give 250 mg of urolithin A with resveratrol and CoQ10, so 500 mg takes 4 capsules and a bottle lasts 15 days, about $5.27 per 500 mg. We found no NSF listing for it.

Pros
  • Uses Mitopure, the trial ingredient
  • Adds 150 mg trans-resveratrol and 60 mg CoQ10
  • A restrained listing from a long-established brand
Cons
  • Only 250 mg of urolithin A per 2-capsule serving; 500 mg takes 4 capsules
  • About $5.27 per 500 mg, the most expensive here
  • We found no NSF listing for it
Check price on Amazon →$79.00 for 60 capsules · seen October 19, 2026
Also considered

Timeline Mitopure Gummies. The same 500 mg of Mitopure in 2 sugar-free gummies at the same $99. Its listing says "NSF Contents Certified" and repeats the softgels' NSF Certified for Sport line, but the NSF listings we found covered the softgels and powder, not the gummies. Check price on Amazon $99.00 for 60 gummies · seen October 19, 2026

Timeline Mitopure Berry Powder. 500 mg of Mitopure per 3 g packet, NSF Certified for Sport, designed to stir into food rather than water, also $99 a month. Check price on Amazon $99.00 for 30 packets · seen October 19, 2026

Not recommended: Neurogan Urolithin Precursor Pro+ contains no urolithin A; it relies on pomegranate extract and other ingredients that only some people convert. Nutri Urolithin A Diacetate is a different compound, and we found no human trials of it.

The full lineup, side by side

Amounts come from each product's printed label; verification comes from the certifier's own listing or a certificate naming its lab. Check the source and verification columns first: independent tests have found urolithin A products well off their labels, and some with none.

ProductUrolithin A sourceUA per day (label)Other activesVerified byCost per 500 mgScore
#1 Timeline MitopureMitopure500 mgNoneNSF Certified for Sport, NSF/ANSI 173$3.304.1
#2 CodeageNot named500 mgNoneNSF/ANSI 173$0.80 (list $2.33)4.0
#3 ProHealthStanYouth500 mgPomegranate, muscadine grapeNamed-lab COA (Qalitex)$2.443.7
#4 ToniiqNot named500 mgPomegranate, NMN, PHGG fiberUnnamed COA$1.173.4
#5 PlantFusionNot named500 mgPomegranate 50 mgUnnamed claim$1.833.3
#6 Pure O ElementsNot named500 mgNAD, resveratrol, CoQ10Unnamed claim$2.003.1
#7 ReviveNot named500 mgRhodiola, CoQ10, apigenin, PQQ, BioPerineUnnamed claim$2.503.0
#8 Pure Encapsulations RenualMitopure250 to 500 mgResveratrol, CoQ10None found$5.272.8

Prices are Amazon prices on October 19, 2026 and change often. Cost per 500 mg is the bottle price divided by the milligrams of urolithin A it holds, times 500. For Codeage, whose Amazon price was about a third of its own list price, we scored the list price. NSF listings were confirmed on nsfsport.com and info.nsf.org.

How to choose, and what to check first

Decide whether the trial ingredient matters to you. Mitopure is the form the research used and the only one with an FDA GRAS notice; other urolithin A is the same molecule, but we found no trials that named a non-Mitopure source and no regulatory filing for it. If you buy a non-Mitopure product, insist on independent verification.

Check the verification, not the purity claim. "98% pure" or "99.4% purity" describes the raw material, not what ended up in your capsule. Look for an NSF listing you can search yourself at nsfsport.com or info.nsf.org, or a certificate of analysis that names the lab.

Know what you are buying. Products labeled as urolithin A "precursors", or pomegranate extract alone, do not contain urolithin A, and many people make little from them. Count the urolithin A milligrams, not the total of a blend.

Before you buy, check these five things.
  • Limited human safety data. People have taken up to 2,000 mg once and up to 1,000 mg a day for four months, with side effects similar to placebo, but we found no longer-term data.
  • Pregnancy and breastfeeding. We found no human safety data; the trials were in adults, mostly over 40, plus one small study in older teenage athletes.
  • Medications. We found no drug-interaction studies. Ask your doctor or pharmacist before combining it with prescription medicines.
  • Expectations. The measured effects are on lab markers and some strength and endurance tests, mostly in company-funded trials, and the largest trials missed their main outcomes.
  • Cost over time. Effects in trials took weeks to months, so budget for at least four months if you want to judge it fairly.

Frequently asked questions

What is urolithin A?

Urolithin A is a compound gut bacteria make from ellagitannins, found in pomegranates, walnuts and berries. In cell and animal studies it promotes mitophagy, the recycling of damaged mitochondria. Supplements provide it directly, usually as Mitopure, a synthetic form made by the Swiss company Amazentis.

Does urolithin A work?

The evidence is early and mixed. The largest trials, in older adults, middle-aged adults and elite runners, missed their main outcomes, though some secondary tests such as hamstring strength and short-term endurance improved, and blood markers of mitochondrial activity and inflammation changed. Most trials were funded by Mitopure's maker, and the two fully independent trials missed their main outcomes.

How much urolithin A should you take?

Trials used 500 mg or, more often, 1,000 mg a day for up to four months. Most single-ingredient products provide 500 mg a day. Follow your product's label and ask your clinician what fits you.

Is Mitopure better than other urolithin A?

It is the same molecule, but Mitopure is the form used in nearly all published trials and the only urolithin A with an FDA GRAS notice. We found no trials that named another urolithin A source, and independent tests have found labeled products well off their claims, so independent verification matters more for them.

Can you get urolithin A from pomegranate?

Only if your gut bacteria can make it. In one sponsor-funded study, about 40 percent of adults converted pomegranate juice into meaningful amounts, and other studies find 5 to 25 percent make none at all. In that study, 500 mg of urolithin A gave more than six times the exposure of a glass of juice.

Is urolithin A safe?

In trials up to 1,000 mg a day for four months, side effects were similar to placebo, and rat studies found no adverse effects at very high doses. We found no human data in pregnancy and no drug-interaction studies.

Is urolithin A approved by the FDA?

No supplement is FDA approved. Mitopure's maker filed a GRAS notice for urolithin A in foods, and FDA replied in 2018 that it had no questions; that covers food use at set amounts, not health claims.

The bottom line

The best urolithin A supplement is one that contains the urolithin A on its label, verified by someone other than the seller, at a price you can sustain for months. Timeline's Mitopure Softgels do that best and use the trial ingredient, Codeage is the value pick with an NSF listing, and ProHealth shows a named lab's result. Keep expectations modest: the largest trials missed their main goals, most of the research was paid for by one company, and we found no trial showing fewer falls, infections or other health events.

VS
Reviewed for accuracy by
Vladimir Salamakha

B.S. in Chemistry, University of South Florida · a formulation scientist with 15 years developing compliant, evidence-based products across nutritional supplements and personal care. More about the author →

A quick note This article is general information, not medical advice. These statements have not been evaluated by the Food and Drug Administration, and these products are not intended to diagnose, treat, cure, or prevent any disease. Urolithin A has been studied for up to four months at up to 1,000 mg a day, mostly in adults. Talk to your doctor or pharmacist before using it if you are pregnant or breastfeeding, take prescription medication, or have a chronic condition; we found no drug-interaction studies. These products are labeled for adults. Product labels and prices change, so check the current details before buying.
Sources
Andreux PA et al. The mitophagy activator urolithin A is safe and induces a molecular signature of improved mitochondrial and cellular health in humans. Nat Metab, 2019. PMID 32694802 (first-in-human trial in older adults: safe up to 2,000 mg single doses; blood and muscle marker changes after 4 weeks; Amazentis authors). · Liu S et al. Effect of Urolithin A Supplementation on Muscle Endurance and Mitochondrial Health in Older Adults: A Randomized Clinical Trial. JAMA Netw Open, 2022. PMID 35050355 (66 adults aged 65 to 90, 1,000 mg for 4 months: 6-minute walk and muscle ATP not significantly different; endurance better at 2 months, not 4; Amazentis-funded). · Singh A et al. Urolithin A improves muscle strength, exercise performance, and biomarkers of mitochondrial health in a randomized trial in middle-aged adults. Cell Rep Med, 2022. PMID 35584623 (88 middle-aged adults, 500 or 1,000 mg for 4 months: peak power not significantly different; hamstring strength +12% on 500 mg vs placebo decline; Amazentis-funded). · Denk D et al. Effect of the mitophagy inducer urolithin A on age-related immune decline: a randomized, placebo-controlled trial. Nat Aging, 2025. PMID 41174221 (50 middle-aged adults, 1,000 mg for 4 weeks: immune-cell marker changes; Amazentis-funded). · Singh A et al. Direct supplementation with Urolithin A overcomes limitations of dietary exposure and gut microbiome variability in healthy adults to achieve consistent levels across the population. Eur J Clin Nutr, 2022. PMID 34117375 (12% had detectable urolithin A at baseline; about 40% converted pomegranate juice; 500 mg gave more than 6-fold exposure; Amazentis-sponsored). · Whitfield J et al. Evaluating the Impact of Urolithin A Supplementation on Running Performance, Recovery, and Mitochondrial Biomarkers in Highly Trained Male Distance Runners. Sports Med, 2025. PMID 40839339 (42 elite runners, 1,000 mg for 4 weeks: 3,000 m time trial not significantly different; Amazentis-funded). · Zhao H et al. Assessment of Urolithin A effects on muscle endurance, strength, inflammation, oxidative stress, and protein metabolism in male athletes with resistance training: an 8-week randomized, double-blind, placebo-controlled study. J Int Soc Sports Nutr, 2024. PMID 39487653 (20 resistance-trained men, 1 g for 8 weeks: repetitions to failure improved; one-rep maximums not significantly different). · Monsalve Acevedo A et al. Effects of Urolithin A supplementation on performance and antioxidant status in academy soccer players during preseason: a pilot randomised controlled trial. Front Nutr, 2025. PMID 41245402 (single-blind pilot, 20 youth soccer players: main endurance test improved (p=0.048)). · da Costa Pinaffi-Langley AC et al. Urolithin A and Endothelial and Cerebrovascular Function in Middle-Aged Adults With Obesity: A Randomized Clinical Trial. JAMA Netw Open, 2026. PMID 42853569 (independent trial, 50 adults with obesity, 1,000 mg for 4 weeks: blood-vessel function not significantly different). · Jamialahmadi T et al. Evaluation of Urolithin A Efficacy in Heart Failure Patients with Reduced Ejection Fraction: A Randomized, Double-blind, Crossover, Placebo-controlled Clinical Trial. Rev Recent Clin Trials, 2024. PMID 38415449 (independent crossover trial, 10 heart-failure patients: heart measures not significantly different). · Kuerec AH et al. Targeting aging with urolithin A in humans: A systematic review. Ageing Res Rev, 2024. PMID 39002645 (systematic review of 5 studies and 250 people). · Dao T et al. Effects of Urolithin A supplementation on muscle health outcomes in humans from randomized controlled trials. Front Nutr, 2026. PMID 42559151 (meta-analysis: pooled 6-minute walk +17 m, not significant, low certainty). · Sandalova E et al. Testing the amount of nicotinamide mononucleotide and urolithin A as compared to the label claim. Geroscience, 2024. PMID 38935229 (independent label testing: urolithin A products from -15.5% to +28.6% of label claims). · Tomás-Barberán FA et al. Ellagic acid metabolism by human gut microbiota: consistent observation of three urolithin phenotypes in intervention trials, independent of food source, age, and health status. J Agric Food Chem, 2014. PMID 24976365 (urolithin metabotypes: 5 to 25% produce none). · Li Z et al. Pomegranate extract induces ellagitannin metabolite formation and changes stool microbiota in healthy volunteers. Food Funct, 2015. PMID 26189645 (pomegranate extract for 4 weeks: 6 of 20 people never produced urolithin A). · Heilman J et al. Safety assessment of Urolithin A, a metabolite produced by the human gut microbiota upon dietary intake of plant derived ellagitannins and ellagic acid. Food Chem Toxicol, 2017. PMID 28757461 (rat toxicology: no adverse effects at the highest doses tested). · Aichinger G et al. Physiologically-Based Pharmacokinetic Modeling of the Postbiotic Supplement Urolithin A Predicts its Bioavailability Is Orders of Magnitude Lower than Concentrations that Induce Toxicity, but also Neuroprotective Effects. Mol Nutr Food Res, 2023. PMID 37195009 (independent pharmacokinetic model: tissue levels may not reach those active in the lab). · US Food and Drug Administration. GRAS Notice No. 791, urolithin A (Amazentis SA); response letter December 20, 2018: no questions, for use in specified foods up to 500 or 1,000 mg per serving. · NutraIngredients (August 30, 2023): testing commissioned by Timeline found no urolithin A in two Amazon products. · NSF Certified for Sport product search (nsfsport.com) and NSF dietary supplement listings (info.nsf.org, NSF/ANSI 173), checked October 19, 2026. · Product Supplement Facts panels, directions and prices from each product's current Amazon listing and codeage.com, read October 19, 2026.