Best Urolithin A Supplement 2026: Amazon's Two Compromised Options
Informational summary — not medical advice. On whether urolithin A works, see the hub and the evidence breakdown. This statement has not been evaluated by the FDA.
The honest headline: there is no clean trial-matched urolithin A pick on Amazon. The Amazentis-funded trials used Mitopure-branded urolithin A at 500-1,000mg/day depending on the trial — Timeline sells Mitopure direct-to-consumer, with no reliable, stable Amazon price, and whether the independently-funded trials (Zhao 2024, the soccer pilot) used the same branded material isn't established. Of the 2 products that do have a live Amazon listing, Pure Encapsulations Renual has the correct molecule (Mitopure-branded free urolithin A) but only 250mg — half the lowest trial dose — bundled with resveratrol and CoQ10. Nutri Urolithin A DIACETATE hits the 1000mg trial-matched dose, but it's urolithin A diacetate, a different molecule than the free urolithin A every trial actually tested. That trade-off — not a clean winner — is the real buying decision here.
As an Amazon Associate we earn from qualifying purchases. Ranked by molecular-form disclosure first, cost per day second — never commissions, and never a fake "winner" where none exists.
The one-line takeaway Both live Amazon options are compromises, and the honesty about which compromise you're making IS the value of this page. Renual gives you the right molecule at half the trial dose (and a higher cost per day). Nutri's diacetate gives you the trial-matched milligram count in a molecule that has never itself been tested in a human trial. Neither is "the" urolithin A supplement from the studies — that product (Timeline Mitopure) is DTC-only.
Both live Amazon products, compared honestly
Sorted by cost per day — which is not the primary decision axis here. Read the Molecular form column before the price: the two products are not interchangeable, and a lower cost per day on the wrong molecule isn't a better deal. Full data is a public CC BY JSON file.
| Product | Molecular form | mg/serving | $/day | $/mg | Dose vs trials |
|---|---|---|---|---|---|
| Nutri Urolithin A DIACETATE | Diacetate (ester/prodrug — NOT the trial molecule) | 1000 mg | $2.11 | $0.0021 | Matches 1,000mg arm — different molecule |
| Pure Encapsulations Renual | Free urolithin A (trial molecule) | 250 mg | $2.63 | $0.0105 | Half the low-dose arm (500mg) |
Prices are live Amazon buy-box figures, July 2026; they move. Cost per day = price ÷ servings per container, assuming the labeled daily serving. Cost per mg is shown for reference only — it is not a fair apples-to-apples comparison across the two molecular forms, since diacetate and free urolithin A are different compounds with no established dose-equivalence in any human trial.
Three things worth reading before you buy
Timeline Mitopure — the branded product behind the Amazentis-funded trials — isn't reliably on Amazon. The Amazentis-funded trials (5 of the 7 in this evidence base) used Mitopure, a patented, batch-tested free-urolithin-A softgel, at 500-1,000mg/day depending on the trial, sold mostly direct-to-consumer through Timeline's own site. Whether the independently-funded trials (Zhao 2024, the soccer pilot) used the same branded material isn't established in this evidence base. Mitopure doesn't have a stable, live Amazon buy-box listing we can verify and track, so it carries no buy button here and isn't a ranked pick — the same treatment this site gives Primeadine in the spermidine category. If molecular and dose accuracy matter more to you than Amazon convenience, it's worth knowing this product exists, even though we can't sell it to you here.
Renual's 250mg is real Mitopure, at half the dose. Pure Encapsulations is a reputable practitioner brand, and Renual does use the Mitopure-branded free urolithin A raw material — the correct molecule. But at 250mg per serving, it's below the 500mg dose that produced a positive strength signal in Singh 2022, and well below the 1,000mg used in every endurance trial. It's also bundled with resveratrol (150mg) and CoQ10 (60mg), neither of which was part of any urolithin A trial's tested formula, which further muddies a clean cost-per-mg read on the urolithin A itself. Taking a double serving would approach the low end of the trial range at roughly double the daily cost.
Nutri's diacetate hits the dose, on the wrong molecule. At 1,000mg/day, this product matches the most commonly used trial dose numerically — but urolithin A diacetate is an ester/prodrug form that patent literature describes as converting to free urolithin A in the body. It was not the form tested in any of the 7 human trials in this evidence base, and there is no published human data establishing that 1,000mg of the diacetate form delivers the same effective exposure as 1,000mg of free urolithin A. Treat this as the cheaper, unverified option, not a dose-equivalent substitute.
We also researched and dropped several other candidates that appeared in earlier web research but did not clear a live-price check: Double Wood Urolithin A 500mg (no confirmed live price; also missing from Double Wood's own DTC catalog) and Toniiq Urolithin A Complex (the 500mg urolithin A is bundled into a 1,500mg 4-in-1 formula with NMN and other ingredients, making a clean single-ingredient comparison impossible). Neither is included in the table above or in the underlying dataset.
Frequently asked questions
What is the best urolithin A supplement?
There's no clean answer. Renual has the correct molecule at half the trial dose; Nutri's diacetate matches the dose but is a different molecule. Neither is the actual trial-grade product (Timeline Mitopure), which is DTC-only.
Why isn't Timeline Mitopure ranked here?
No reliable, live Amazon price — it's sold direct-to-consumer only. Referenced editorially as the branded ingredient behind the Amazentis-funded trials (500-1,000mg/day depending on the trial), no buy button.
Is urolithin A diacetate the same as what the trials tested?
No. Every trial used free urolithin A. Diacetate is a different ester/prodrug molecule with no established human dose-equivalence.
Is 250mg from Renual enough?
Below the 500mg dose that showed a positive strength signal, and well below the 1,000mg endurance-trial dose. Correct molecule, insufficient amount at one serving.
Related
- Urolithin A: what it is & the funding count
- Urolithin A dosage guide — 500-1,000mg trial range vs the shelf
- Urolithin A for muscle & exercise endurance
- Does urolithin A work? — the honest, industry-funded read
Sources
- Manufacturer labels and live Amazon pricing for both listed products, July 2026. Full dataset: /urolithin-a/cost-by-brand.json (CC BY 4.0).
- Singh A, D'Amico D, Andreux PA, et al. "Urolithin A improves muscle strength, exercise performance, and biomarkers of mitochondrial health in a randomized trial in middle-aged adults." Cell Rep Med. 2022. PMID: 35584623 (500mg and 1,000mg dose arms).