Published 2026-09-16 · Last reviewed 2026-09-16 · By Andy Palenzuela, Founder
Urolithin A went from a research curiosity to a shelf category in a few years, and the shelf now has three kinds of bottle on it: products that contain urolithin A, products that contain a precursor and hope your bacteria will make it, and products that put the word on the front and a trace amount inside. This guide gives you six checks that separate them, explains what each check is for, and shows how CELLUBIOME scores. It is written by the founder of Age Revive, who spent 14+ years inside regulated nutrition supply chains before formulating a gut-mito product around 500 mg of urolithin A.
Read the Supplement Facts panel, not the front label. You are looking for the words "urolithin A" with a milligram amount next to them.
What you will sometimes find instead:
Pass: urolithin A, named, with its own milligram figure.
Two human trials define the range. Andreux 2019 tested 250, 500, and 1,000 mg/day for 28 days in adults aged 61–85; the 500 and 1,000 mg doses produced a mitochondrial gene-expression signature in muscle, and 250 mg did not. Singh 2022 tested 500 and 1,000 mg/day for four months in middle-aged adults and reported changes in mitochondrial-health biomarkers and muscle-performance measures versus placebo.
So the range with biomarker findings is 500–1,000 mg/day. 500 mg is the lower dose that appears in both trials.
What decoration looks like: 100 or 250 mg per serving — a fifth to half of the lowest dose that produced a signature — in a product that still puts "urolithin A" in the name.
Pass: 500 mg or more per daily serving.
Supplement-grade urolithin A is a manufactured ingredient, and the purity of the raw material varies by supplier. A brand that has sourced high-purity material will say so, because it costs more. A brand that does not state purity may be using material with a lower assay, which means "500 mg" on the label can be 500 mg of a powder that is not all urolithin A.
Pass: a stated purity figure. CELLUBIOME's is ≥99%.
"Third-party tested" without a document is a phrase. A certificate of analysis is: a laboratory name, an accreditation (ISO/IEC 17025 is the standard for testing labs), a lot number, and a tested value for urolithin A specifically, against the label claim.
CELLUBIOME's current certificate (Lot 150126, an ISO/IEC 17025-accredited lab) is published on the quality page: urolithin A tested at 548.15 mg per 2-capsule serving against a label claim of not less than 500 mg, tributyrin at 530.80 mg, microbial panel passed, heavy metals screened. That is what a pass looks like — a document you can read, not a badge.
Pass: a certificate you can open, with a urolithin A assay on it.
This is where the category splits into lanes, and the honest comparison is between lanes rather than brands.
Urolithin A is a gut-derived molecule that does its studied work downstream, in mitochondria. On its own it says nothing about the gut it came from — specifically the colon lining, whose cells run on a short-chain fatty acid called butyrate. A single-molecule urolithin A product is a legitimate product; it addresses one layer.
CELLUBIOME pairs 500 mg urolithin A with 500 mg tributyrin, a butyrate triglyceride designed to survive stomach acid, in an enteric-coated capsule. One serving supports mitochondrial renewal through the mitophagy pathway and gut-barrier integrity. Not just gut. Mitochondria too. The delivery reasoning is in Tributyrin vs Sodium Butyrate and the pairing logic in Urolithin A + Tributyrin.
The question for any bottle is the same: what is the second ingredient doing, and is it dosed like it matters? Urolithin A next to a probiotic is two unrelated jobs in one capsule (see Urolithin A vs Probiotics). Urolithin A next to eight trace "longevity" ingredients is one real dose and eight decorations.
Pass: either a clean single molecule at a full dose, or a pairing where the second ingredient has its own job and its own full dose.
Urolithin A is an expensive raw material, so price differences between products usually come down to dose, purity, and what else is in the serving. That makes the useful comparison simple:
If two products cost about the same for 500 mg of urolithin A and one of them also delivers 500 mg of enteric-coated tributyrin, the second molecule is effectively the difference. That is the comparison Age Revive wants you to make — not a discount, not a trial offer. CELLUBIOME is $110.00 one-time or $93.50 per month with Subscribe & Save, for 60 enteric-coated capsules (a 30-day supply), in glass, with free US shipping.
| Archetype | What the label shows | Which checks it fails |
|---|---|---|
| Single-molecule urolithin A | Urolithin A 500 mg, nothing else | None on its own terms — it addresses one layer. Compare on Check 5. |
| Precursor product | Pomegranate extract, ellagic acid, "urolithin precursor" | 1 — it is not urolithin A; depends on your bacteria |
| Low-dose blend | Urolithin A 100–250 mg inside a multi-ingredient "longevity" formula | 2, often 3 and 4 |
| Urolithin A + gut-barrier support | Urolithin A 500 mg + a butyrate source at a full dose, enteric-coated | This is the CELLUBIOME lane |
None of these is dishonest by definition. The first is a fair product. The second and third are what the six checks exist to catch.
| Check | CELLUBIOME (per 2-capsule daily serving) |
|---|---|
| 1. Urolithin A itself | Yes — urolithin A, named, 500 mg |
| 2. Dose vs trials | 500 mg — the lower dose used in both human trials |
| 3. Purity stated | ≥99% |
| 4. Lot certificate | Lot 150126 published; urolithin A tested at 548.15 mg per serving |
| 5. Pairing | 500 mg enteric-coated tributyrin for colonocyte and gut-barrier support |
| 6. Price at equal dose | $110.00 / $93.50 sub — compare against single-molecule products at 500 mg, then count the second molecule |
Not a probiotic. No proprietary blend. Glass bottle. CELLUBIOME.
What is the best urolithin A supplement? The one that passes six checks: it contains urolithin A itself (not a pomegranate precursor), at 500 mg or more per day, with stated purity, a published lot certificate, a second ingredient that has its own job at a full dose, and a price that compares fairly at equal urolithin A dose. Which of those matters most to you is a personal decision.
Is pomegranate extract the same as urolithin A? No. Pomegranate extract supplies ellagitannins, which certain gut bacteria can convert to urolithin A. Research suggests most people's microbiomes do not do this efficiently. A urolithin A supplement supplies the molecule directly.
How much urolithin A should a supplement contain? Human trials used 250, 500, and 1,000 mg/day; the 500 and 1,000 mg doses were the ones associated with mitochondrial biomarker changes. CELLUBIOME provides 500 mg per daily serving.
Why does CELLUBIOME cost more than some urolithin A products? Compare at equal dose first — 500 mg of urolithin A at ≥99% purity is an expensive raw material in any bottle. CELLUBIOME also delivers 500 mg of enteric-coated tributyrin for gut-barrier support in the same serving, tests every lot, and ships in glass. It is $110.00 one-time or $93.50 per month on subscription.
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Andy Palenzuela is the founder of Age Revive and has 14+ years of experience in regulated nutrition supply chains, including manufacturing oversight, ingredient sourcing, and quality assurance for consumer health products. Age Revive formulas are developed based on published peer-reviewed research and manufactured at cGMP-certified facilities. LinkedIn
These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. The information in this article is for educational purposes only and is not intended as medical advice. Consult your healthcare provider before starting any supplement regimen.