Reviewed August 7, 2026. Urolithin A is a gut-microbiome-derived metabolite being studied for its effects on mitochondria and muscle function. Human research is promising but still limited, and it does not show that urolithin A provides an immediate energy boost or treats fatigue.
What urolithin A does
Some gut bacteria can convert compounds in foods such as pomegranates, berries and walnuts into urolithin A. Laboratory research suggests that urolithin A can influence mitophagy, the process cells use to remove damaged mitochondria. That mechanism is scientifically interesting, but a mechanism alone does not prove a noticeable benefit in people.
What human trials found
In a randomized trial of 66 adults ages 65 to 90, participants received 1,000 mg of urolithin A or placebo daily for four months. The primary outcomes—six-minute walking distance and maximal ATP production—did not improve significantly versus placebo. Some secondary muscle-endurance measures and blood biomarkers did improve, and adverse-event rates were not statistically different between groups. The researchers said more work is needed to confirm the findings.
A separate four-month trial in 88 untrained, overweight, middle-aged adults tested 500 mg and 1,000 mg daily. It reported improvements in some leg-strength and biomarker measures, but the primary peak-power endpoint did not improve significantly. The study was sponsored by a urolithin A manufacturer, and several authors disclosed company relationships.
What “cellular energy” does—and does not—mean
ATP and mitochondrial biomarkers are research measures. They should not be translated into promises that a supplement will make every user feel more energetic. Persistent fatigue can have many causes, including sleep problems, anemia, thyroid disease, infection, medication effects and other conditions. Seek medical advice for new, severe or ongoing fatigue.
Choosing a product
Check the exact amount per serving, other active ingredients, serving frequency and third-party quality information. Findings from single-ingredient trials do not automatically establish the effects of a combination formula. WINYEL’s Urolithin A Longevity Gummies with CoQ10 should be evaluated from its own package label.
Sources and limitations
- Randomized trial in older adults (JAMA Network Open, 2022)
- Randomized trial in middle-aged adults (Cell Reports Medicine, 2022)
- WINYEL Product Quality & Transparency
This article is educational and is not medical advice. Ask a qualified healthcare professional whether a supplement is appropriate for you.