Head to head
Urolithin A against MitoQ
Two mitochondrial supplements with different jobs, clearing damaged mitochondria against reducing oxidative damage inside them. MitoQ failed mouse lifespan testing and improved vascular function in a randomised trial of 20 healthy older adults.
Column A
Urolithin AUrolithin A
A gut-derived compound that triggers mitophagy and has improved muscle function in older adults in human trials, one of the better-evidenced longevity supplements.
Column B
MitoQMitoQ (mitoquinone mesylate), mitochondria-targeted antioxidant
A widely sold mitochondrial antioxidant that failed mouse lifespan testing, and that did improve vascular function in a randomised trial of 20 healthy older adults.
Side by side, on the facts we can check
| Attribute | Urolithin A | MitoQ |
|---|---|---|
| Category | Muscle & Performance | Antioxidant |
| FDA status | Sold as a supplement (GRAS); not an approved drug | Sold as a dietary supplement in the United States. Not approved to prevent or treat anything. |
| Half-life | Several hours | Not asserted. No reliable human half-life figure was resolved in the sources loaded. Mitochondrial accumulation means tissue kinetics differ substantially from plasma kinetics. |
| Molecular weight | 228.2 Da | Roughly 665 Da for the mesylate salt. A small molecule, not a peptide. |
| Mechanism | Induces mitophagy, clearing damaged mitochondria and improving the quality of the cellular energy supply, especially in muscle. | A ubiquinone moiety, the same redox-active head group as coenzyme Q10, covalently attached to a triphenylphosphonium cation. That lipophilic cation accumulates several hundred-fold inside mitochondria, driven by the negative membrane potential across the inner membrane. So unlike ordinary antioxidants, which distribute broadly, MitoQ concentrates where mitochondrial superoxide is produced. Note that it is not a coenzyme Q10 substitute: it does not participate in the respiratory chain as an electron carrier, because the targeting group interferes with that role. |
| Human studies cited | 3 | 1 |
| Legal status, US | Sold as a dietary supplement | Sold as a supplement |
Frequently asked questions
What is the difference between Urolithin A and MitoQ?
Urolithin A: A gut-derived compound that triggers mitophagy and has improved muscle function in older adults in human trials, one of the better-evidenced longevity supplements. MitoQ: A widely sold mitochondrial antioxidant that failed mouse lifespan testing, and that did improve vascular function in a randomised trial of 20 healthy older adults.
Which has stronger research evidence, Urolithin A or MitoQ?
This database does not grade compounds. It counts what was run in people: 3 of the 3 studies cited on the Urolithin A profile were human work, against 1 of 2 for MitoQ. Those counts are of our own citation lists and understate any larger literature, and neither is a recommendation.
Are Urolithin A and MitoQ FDA-approved?
Urolithin A: Sold as a supplement (GRAS); not an approved drug. MitoQ: Sold as a dietary supplement in the United States. Not approved to prevent or treat anything..
Reviewed Sep 2026. This page sets two published records side by side. It is educational, it is not medical advice, and it contains no dosing protocols or recommendations for personal use.