~40%
Dietary UA Producers
After a standardized pomegranate-juice challenge, only ~40% of 100 US adults converted ellagitannins to meaningful urolithin A; only 12% had detectable UA at baseline.
6+
Placebo-Controlled RCTs
Rare for a longevity supplement — but nearly all sponsored by the patent holder (Amazentis/Timeline Mitopure).
+12%
Hamstring Strength vs Placebo
500 mg/day × 4 months in middle-aged adults (ATLAS trial, n=88). Primary endpoint (peak power) did not separate.
$85–125
Mitopure / Month (US)
500 mg/day branded dose; subscription vs one-time pricing. Generic capsules often cheaper — label accuracy varies.
What It Actually Is
PubMedEllagitannins from pomegranate, walnuts, and berries are broken down in the gut to ellagic acid, then — only if you carry the right bacteria — converted to urolithin A (UA). UA activates mitophagy (recycling damaged mitochondria) via the PINK1/Parkin pathway. Direct UA supplementation bypasses the microbiome lottery; that is the entire commercial case for Mitopure.
Evidence Stack
PubMedWhat Animal Models Show
PreclinicalLifespan
+45%
Mean lifespan extension in C. elegans with UA treatment — the paper that launched the mitophagy-longevity story.
→ PMID 27400265 (Ryu et al., Nature Medicine, 2016)
Running Capacity
+57%
Running endurance improvement in aged mice — same foundational study; muscle function restored without exercise training.
Mitophagy Mechanism
PINK1/Parkin
UA triggers mitophagy and improves mitochondrial respiration in muscle — mechanism replicated across independent preclinical labs.
→ PMID 34030963 (D'Amico review, 2021)
Plasma Exposure
>6×
500 mg direct UA supplementation delivered >6-fold higher 24-hour plasma exposure vs. 8 oz pomegranate juice in a randomized comparison — food alone is unreliable for non-producers.
Published Human Trials
RCTs| # | Study | Type · n | Outcome |
|---|---|---|---|
| 1 | Andreux 2019 · PMID 32694802 Nature Metabolism — first-in-human | RCT · elderly, sedentary | Safe 500–1000 mg × 4 wk improved mitochondrial gene expression and acylcarnitine profile (biomarkers). |
| 2 | Singh 2022 · PMID 35584623 ATLAS · Cell Reports Medicine | RCT · n=88 (79 completed), 40–64 y | Mixed +12% hamstring strength at 500 mg (p=0.027); 6-min walk +7% at 1000 mg. Primary endpoint (peak power) NS. |
| 3 | Liu 2022 · PMID 35050355 JAMA Network Open | RCT · n=66, ages 65–90 | Mixed Improved muscle fatigue endurance in hand/leg at 1000 mg. 6-min walk and muscle ATP production NS vs placebo. |
| 4 | Denk 2025 · PMID 41174221 Nature Aging | RCT · immune aging | Positive signal Mitophagy inducer tested on age-related immune decline — recent peer-reviewed human data. |
| 5 | Whitfield 2025 · PMID 40839339 Sports Medicine | RCT · trained male runners | Athletic population Running performance, recovery, mitochondrial biomarkers — see paper for endpoint mix. |
| 6 | Jamialahmadi 2024 · PMID 38415449 | Crossover RCT · heart failure HFrEF | Specialty population Small crossover in reduced-ejection-fraction patients — exploratory cardiac endpoint. |
| 7 | Kuerec 2024 · PMID 39002645 | Systematic review | Review Synthesizes human UA trials — useful map; does not replace reading individual primary endpoints. |
Reality check: Urolithin A has more human RCTs than most compounds on this site — but the flagship trials were company-funded, authors held Amazentis patents or employment, and prespecified primary endpoints (peak power, 6-minute walk, muscle ATP) often did not beat placebo even when secondary muscle-endurance measures did. That pattern is real signal and real spin risk — report both.
Cost vs. Mitochondrial Alternatives
MarketPatented Brand
Mitopure (Timeline)
$85–125
per month · 500 mg/day
NSF Certified for Sport; dose matches RCTs
Generic UA Capsules
$40–80
per month
Independent testing found label-vs-content deviations in some brands — verify before buying.
Food Path
Pomegranate / Walnuts
$15–40
per month food cost
Works only if you are a microbiome converter (~40% in US PJ challenge)
NR / NMN
$30–80
per month oral
Different pathway (NAD+ precursors); deeper trial count, not mitophagy-specific
Exercise
$0
150+ min/week moderate
Strongest proven mortality benefit on this shelf; raises your own mitophagy pathways
💰 Follow the Money — Precisely Stated
This is not a suppressed-generic story. Amazentis patented urolithin A, funded the major RCTs, and sells Mitopure through Timeline at premium pricing. Conflict-of-interest disclosures on PMID 35050355 list multiple authors as employees, founders, and patent holders. The honest structural claim: positive trials exist, but independent replication at scale does not yet. Cheaper generic UA products compete on price; third-party testing suggests some fail label claims — a quality problem, not a censorship story.
Trial-Aligned Dosing + Cost Calculator
Trial dosesRCT standard
500 mg/day
Oral · minimum 4 months in ATLAS and Andreux trials · hamstring strength signal at this dose
TRIALHigh-dose trial arm
1000 mg/day
Used in Liu 2022 (older adults) and ATLAS 1000 mg arm · doubles supplement cost
TRIALFood-only path
Ellagitannins
Pomegranate, walnuts, berries — effective only for ~40% converters; plasma UA often undetectable in non-producers
DIETHonest gap
No lifespan dose
No human trial establishes a dose that extends life or prevents disease. Muscle biomarkers ≠ longevity proof.
SAFETY🧮 Monthly Cost Calculator
Trial dose is 500 or 1000 mg/day. Enter what you would pay for a 30-day supply at that dose — the math only, not medical advice.
Regulatory Position
T1FDA (US)
Dietary Supplement Ingredient
No FDA-approved drug indication for urolithin A. Mitopure is marketed as a supplement/postbiotic, not a prescription therapy. openFDA returns no drug label.
Quality / Sport
NSF Certified for Sport (Mitopure)
Branded product carries third-party certification; generic products lack equivalent verification — label accuracy is buyer-beware.
WADA / USADA
Not Individually Listed
Urolithin A is not named on the 2026 WADA Prohibited List as a standalone entry. Athletes should confirm with their governing body; mitophagy/metabolic-modulator catch-alls may apply in edge cases.
PubMed vs. The Doctors
Named VoicesPubMed📚 What PubMed Shows
Mitophagy activation is mechanistically coherent across species (PMID 27400265) and moves human muscle biomarkers in RCTs — but prespecified primary endpoints in the largest trials often failed.
Direct supplementation produces far more consistent plasma UA than pomegranate juice in non-producers (Andreux 2021).
No human trial measures lifespan, dementia prevention, or hard disease endpoints at scale — muscle surrogate outcomes only.
🩺 What Practitioners & Experts Say
Johan Auwerx, MD PhD (EPFL) — co-author on foundational UA mitophagy work. Academic credibility; also collaborates on Amazentis-funded translational trials.
Patrick Aebischer, MD — Amazentis board chair during human trials (disclosed on PMID 35050355). Commercial stake precisely stated, not inflated into conspiracy.
Pass 3 gap: No large independent clinician case series with published patient outcomes found. Public discussion is dominated by trial authors and supplement marketing — not practitioner-reported cohort data.
Community reports (anecdotal): Users often describe subtle energy and recovery improvements after 8–12 weeks — consistent with trial duration, impossible to separate from placebo at n=1. Cost is the most common complaint.
The Bottom Line — In Plain English
An honest read of urolithin A in 2026
What it is: A gut metabolite you may never make, now sold as a patented pill that turns on mitophagy. The biology is real; the business model is "your microbiome failed, buy ours."
What the trials show: Several placebo-controlled RCTs — unusual for a supplement — with meaningful secondary muscle-endurance and biomarker wins, but missed primary endpoints in the headline trials and heavy industry funding throughout.
- ~40% of people convert dietary ellagitannins to meaningful UA; direct supplementation fixes that — at $85–125/month for Mitopure.
- +12% hamstring strength at 500 mg × 4 months is the best-known functional number (PMID 35584623) — modest, not transformative.
- No human lifespan or disease-prevention RCT exists; do not read muscle papers as longevity proof.
- Generic UA products are cheaper; independent testing found label deviations — verify or pay for certified product.
- Not medical advice. Talk to your doctor before starting any supplement, especially if pregnant, on multiple medications, or managing a serious condition.