Longevity & Mitochondrial

Urolithin A

Also known as UroA · UA · Mitopure

Emerging researchOralTopicalNot an FDA-approved drug; marketed as a dietary supplement and food ingredient. The synthetic form (Mitopure, from Amazentis) received an FDA 'no questions' response to GRAS (Generally Recognized As Safe) Notice GRN 791 in 2018, covering the specified conditions of use in certain conventional foods and beverages; its sale as an over-the-counter dietary supplement is regulated separately under DSHEA rather than by that GRAS determination. As a non-peptide small molecule it falls outside pharmacy compounding (503A/503B) categories and is not a compounded drug. Urolithin A is not currently listed on the WADA Prohibited List, but athletes should verify the current list and consider third-party-tested products, since supplement contamination is a recognized risk.

Urolithin A is a small-molecule metabolite produced when gut bacteria convert ellagitannins and ellagic acid found in foods such as pomegranates, walnuts, and berries; it is not present in foods directly, and many people's microbiomes do not produce it efficiently, which is why it is also supplied as a synthetic supplement (branded Mitopure). Its proposed mechanism is the induction of mitophagy — the cellular recycling of damaged mitochondria — along with supporting mitochondrial biogenesis and reducing inflammatory signaling. Randomized, placebo-controlled human trials have examined effects on muscle mitochondrial gene expression, muscle endurance and strength, physical performance, and markers of immune aging, while broader longevity claims remain largely based on preclinical and exploratory data. Studies in middle-aged and older adults have reported it to be generally well tolerated. The overall research base includes several human RCTs but is still maturing, with many proposed benefits at an emerging stage.

Studied / used for

Investigated for support of mitochondrial function and mitophagy
Studied for effects on muscle endurance and physical performance
Investigated for markers of age-related immune decline
Studied for cellular and metabolic markers associated with aging
Investigated topically for skin-aging and photodamage markers

Commonly reported side effects

Mild muscle aches or myalgia commonly reported
Mild gastrointestinal or digestive discomfort commonly reported
Generally reported as well tolerated, with no serious adverse events reported in the trials conducted to date

Emerging research. Active research; human evidence still developing. This reflects the strength of the research base, not effectiveness or a recommendation.

Not medical advice.

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