Urolithin A Reference

Plain English

What it is

Urolithin A is a compound your gut bacteria make when you digest certain foods like pomegranates, berries, and walnuts. It is sold over the counter as a dietary supplement, with the most-studied version being a brand called Mitopure. It is not an FDA-approved drug for any condition.

What people use it for

People interested in healthy aging take it hoping to support their mitochondria, the tiny power plants inside cells, and to help aging muscles. The main hope is better muscle strength, endurance, and overall cellular health.

What the science shows

Small randomized human trials in middle-aged and older adults reported better muscle endurance and improved lab markers of mitochondrial health, and early research found it appears safe and well tolerated. But those trials only measured short-term performance and blood markers, not long-term health. There is no large outcome trial, so longevity and anti-aging benefits remain unproven in people.

The catch

The early signals are interesting, but the human evidence is limited to surrogate markers (lab readouts and short tests), not proof that it helps people live longer or healthier over time. Because supplements are not regulated like approved drugs, quality and the actual amounts in a product can vary a lot from one maker to another. For research and educational purposes only. Not medical advice.

Reference summary

Andreux 2019 Nat Metab reported safety and a molecular signature of improved mitochondrial health in humans. Singh 2022 Cell Rep Med (middle-aged adults) and Liu 2022 JAMA Network Open (older adults) reported improvements in muscle endurance and mitochondrial biomarkers in randomized trials. All published human data are surrogate-marker; no Phase 3 outcome trial exists.

Regulatory and posture

Categories

Longevity

Aliases

UA, Mitopure (Amazentis brand), Ellagitannin metabolite (OTC dietary supplement)

Evidence posture

human - Surrogate-marker human RCTs only; no outcome trial.

Regulatory status

Over-the-counter dietary supplement in the United States. Urolithin A from Amazentis (sold under the Mitopure brand) received an FDA GRAS 'no questions' letter in December 2018 (GRN 791); GRAS designates safe-as-food, not approved-as-drug. Not FDA-approved as a drug for any indication.

Content review status

research reference