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Urolithin A

Urolithin A

Best for

Get stronger

Promising early signal 500–1000 mg/day 8–16 weeks 2 studies, n=59

Urolithin A shows a promising early signal for strength and exercise endurance in older adults, while larger, longer trials remain needed to confirm meaningful benefits.

Median effective dose, most-studied outcomes

  • Sustain more output for longer 1,000 mg 4–17 wk
  • Improve cellular energy production 750 mg 16–17 wk
  • Increase everyday strength 1,000 mg 8–16 wk
Full protocol, 4 outcomes

Risk, worst reported severity

  • myalgia mild
  • adverse events (any)
  • 5-fluorouracil major
  • cisplatin moderate
All 12 events and interactions

What urolithin a actually does

Outcome Effect Evidence Dose Time Rank
Worth watching 2
Keep going longer during exercise Promising early signal Exercise endurance helps you sustain effort before fatigue makes you slow down or stop.
moderate 		4 RCTs 4 papers · n=88 1000 mg 4–8 wk #10 /42
Get stronger Promising early signal Strength helps your muscles produce more force for lifting, carrying, and daily movement.
moderate 		2 RCTs 2 papers · n=59 500–1000 mg 8–16 wk —
Early research 1
More muscle energy for training Not enough research Muscle energy stores provide quick fuel for hard efforts during training.
trivial 		1 RCT 1 papers · n=42 1000 mg 4 wk —

Effect tiers come from native-unit MCID where available, Cohen's d otherwise.

Protocol

Dose, timing & forms

How much

The most useful early protocols for strength, endurance, and cellular-energy markers use 500 to 1,000 mg daily of oral urolithin A. Studies examining everyday strength generally ran for 8 to 16 weeks, while endurance-focused protocols ranged from 4 weeks to roughly 4 months.12 The results justify interest, but they do not yet establish urolithin A as a reliable performance supplement for everyone.2

When and how long

Consistency matters more than treating urolithin A like a pre-workout. Human protocols use it every day for weeks, allowing mitochondrial turnover to build over time rather than aiming for an immediate exercise-day effect.12 No trial evidence establishes a clearly superior time of day or a required meal rule, so choose a time you can repeat daily.12

Forms & standardisation

Look for a product that lists purified urolithin A and states the amount per serving. The key trials tested oral urolithin A itself, not pomegranate extract or a general ellagitannin blend, because food-based conversion depends heavily on your gut microbes.12

Studied range, by outcome

Outcome Studied range Median effective Duration Evidence
Sustain more output for longer 1,000 mg 1,000 mg 4–17 wk 4 papers 4 sig. endpoints
Improve cellular energy production 500–1,000 mg 750 mg 16–17 wk 2 papers 2 sig. endpoints
Increase everyday strength 500–1,000 mg 1,000 mg 8–16 wk 2 papers 5 sig. endpoints
Power muscle effort and recovery 1,000 mg — 4 wk 1 paper

Adverse events and drug interactions

Safety events

myalgia mild
adverse events (any)
genotoxicity (micronucleus formation / DNA strand breaks / topoisomerase II poisoning)
estrogenic activity / endocrine disruption
oxidative stress / increased reactive oxygen species
cellular senescence (after prolonged exposure)
gastrointestinal toxicity (potential / knowledge gap)
All adverse events

Drug interactions

5-fluorouracil major increases concentration
cisplatin moderate increases effect
doxorubicin moderate decreases concentration
antineoplastic agents moderate increases effect
Buy well

Recommended Urolithin A products

Real products that dose Urolithin A where the research does, in a clean formulation, from brands we've audited. We only list ones we'd stand behind.

Chosen for adequate Urolithin A dosing vs. the studied range, a clean formulation (grade A–C), and independent brand-quality audits. Not sponsored.

In context

What this is and how it works

  • Across 2 studies (n=59), heavier-weight performance improved; 4 studies (n=88) also reported longer fatigue resistance.2
  • Seven papers reviewed here span 27 outcomes, including strength, exercise performance, and mitochondrial-health measures.
  • Most evidence comes from small human studies, limiting confidence in how large and lasting benefits are.

Urolithin A is a compound your gut can produce after you eat ellagitannin-rich foods such as pomegranate, walnuts, and berries. The catch is that many people do not make much of it, so clinical trials use a purified oral form instead.1

Urolithin A switches on mitophagy, the quality-control system that tags damaged mitochondria for removal and replacement. Think of it like taking dead batteries out of a device before they leak and slow everything else down. In human trials, it changed molecular markers tied to this mitochondrial cleanup process.1

Bottom line

Urolithin A is worth watching if you want a daily healthy-aging supplement with early, moderate signals for strength and exercise endurance. It is not the pick for someone expecting a dramatic pre-workout boost, and anyone using cancer treatment drugs should get clinician guidance before trying it. The strongest human evidence still needs larger, longer trials.12

Frequently asked

Common questions

What does urolithin A do?

Urolithin A triggers mitophagy, a cellular cleanup process that removes worn-out mitochondria so cells can rebuild a healthier energy-making network. Early human trials link this process with better muscle strength and exercise output, though the performance evidence remains promising rather than settled.12

Is urolithin A the same as pomegranate extract?

No. Pomegranates contain compounds that some gut microbes can convert into urolithin A, but people vary widely in that conversion. The human trials used urolithin A itself, which gives a much more predictable dose than relying on food alone.1

How long does urolithin A take to work?

The studies that found changes used daily supplementation for several weeks, not a single dose before exercise. Strength and endurance protocols generally ran from about one to four months.12

Sources

Sources

  1. 1. The mitophagy activator urolithin A is safe and induces a molecular signature of improved mitochondrial and cellular health in humans (2019) ↑
  2. 2. Urolithin A improves muscle strength, exercise performance, and biomarkers of mitochondrial health in older adults: A randomized trial (2022)

Generated August 27, 2026

Related

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