Urolithin A: The Complete Guide to Benefits, Dosage & Science

Urolithin A is a postbiotic compound your gut produces from pomegranate and berry polyphenols. It is studied for its role in supporting mitophagy — the body’s natural process of renewing aged mitochondria — and is associated in research with mitochondrial and muscle function during healthy aging.

This guide is the hub for everything we cover about Urolithin A: what it is, how it works, what the human research actually says, sensible dosage, and how to read a label so you can choose well. Each section links to a deeper article in our Urolithin A series.

What Is Urolithin A?

Urolithin A is a metabolite — a postbiotic — produced when gut bacteria break down ellagitannins and ellagic acid found in pomegranate, raspberries, walnuts and other foods. The catch: research suggests only a minority of people host the gut bacteria needed to make meaningful amounts of it from food alone. That gap is why direct Urolithin A supplements have become a focus of longevity research. We cover the food-conversion question in depth in Can You Get Urolithin A From Food?

How Urolithin A Works: Mitophagy & Mitochondrial Health

Mitochondria are the energy producers inside your cells, and they wear out over time. Mitophagy is the body’s recycling process that clears damaged mitochondria so healthier ones can take their place — a process that naturally declines with age. Urolithin A is studied specifically as a compound that supports mitophagy, which is the mechanism behind most of the research interest. We explain this process in full in What Is Mitophagy?

What the Research Shows

Urolithin A is one of the more studied longevity compounds, including early human trials. In the first-in-human study — Andreux et al., 2019, Nature Metabolism — researchers tested Urolithin A across 250 mg, 500 mg and 1000 mg and reported it was well tolerated and bioavailable at every dose, producing a molecular signature consistent with improved mitochondrial health in older adults. A later randomized trial in middle-aged adults — Singh et al., 2022, Cell Reports Medicine — observed improvements in muscle endurance with four months of supplementation at 500 mg and 1000 mg per day. Important context: the muscle-endurance benefits were observed at 500–1000 mg per day, building up over months of consistent use, not days. As with any nutrition research, studies describe what was observed in those participants — they are not a promise of individual results.

For an honest, expectation-setting summary of the evidence, see How Long Until Urolithin A Works?

How Much Urolithin A Per Day?

250 mg is the lower end of the clinically studied range, not an arbitrary amount. The first-in-human trial (Andreux 2019) specifically tested 250 mg alongside 500 mg and 1000 mg, and found it safe and bioavailable. The muscle-endurance trials then used the higher 500–1000 mg doses. So the honest framing is: Urolithin A is studied from 250 mg; if your single priority is matching the exact muscle-endurance trial dose, look for 500 mg+; if your priority is a broad daily cellular-support routine, a multi-compound formula built around 250 mg may suit you better. It’s also worth noting Urolithin A holds FDA-reviewed GRAS status (Generally Recognized As Safe) — a safety designation for the ingredient, not a dose recommendation. We break the numbers down in How Much Urolithin A Per Day?

Urolithin A Supplements Compared

Product	Urolithin A / serving	Other actives	Approx. price / serving	Third-party tested	Format
NAO Longevity+	250 mg	L-BAIBA, NR, PQQ, L-Ergothioneine, berry polyphenols	~$1.23	Yes, every batch	Vegan gummy
Timeline Mitopure	500 mg	None (single ingredient)	~$3+	Yes (patented, NSF)	Powder / capsule / gel

Prices change — always check the current product page. Timeline Mitopure is the patented, clinically researched single-compound leader at a premium price. For a full side-by-side, see NAO Longevity+ vs Mitopure: An Honest Comparison and Affordable Alternatives to Mitopure.

How NAO Longevity+ Fits

NAO Longevity+ takes a multi-compound approach: 250 mg of Urolithin A per serving alongside five complementary longevity actives — each addressing a different part of how mitochondria age:

• Urolithin A (250 mg) — supports mitophagy, the clearing of worn-out mitochondria.
• PQQ (10 mg) — studied for mitochondrial biogenesis, the building of new mitochondria (the complement to clearing old ones).
• NR / Nicotinamide Riboside (100 mg) — an NAD+ precursor for cellular energy, a different pathway from Urolithin A.
• L-Ergothioneine (20 mg) — a rare cytoprotective antioxidant.
• L-BAIBA (300 mg) — an exercise-signaling molecule found in very few supplements on the market, a genuine point of difference for NAO.
• Berry polyphenol blend (300 mg) — antioxidant support and Urolithin A precursors.

To be transparent: 250 mg is below the 500–1000 mg used in Urolithin A–only muscle-endurance trials. NAO’s design is a daily multi-ingredient routine — more pathways covered, third-party tested every batch, at roughly $1.23 per serving versus $3+ for a single-ingredient premium product. Which approach is right depends on your goal — and we’d rather you know the numbers than guess.

Frequently Asked Questions

What is Urolithin A used for?
It is studied for supporting mitophagy and mitochondrial function as part of healthy aging, with research interest in muscle endurance and cellular energy.

Is Urolithin A the same as pomegranate extract?
No. Pomegranate provides the precursors, but most people’s gut bacteria convert little of it to Urolithin A — which is why direct Urolithin A supplements exist.

How much Urolithin A should I take per day?
Human studies generally used 500–1000 mg/day for muscle endurance, but 250 mg was also tested and found safe and bioavailable (Andreux 2019). Multi-compound daily formulas often use 250 mg. Match the dose to your goal.

Is 250 mg of Urolithin A enough?
250 mg is the lower end of the clinically studied range — it was tested in the first human trial and found safe and bioavailable. It is below the 500–1000 mg used in muscle-endurance trials. In a multi-ingredient formula like NAO Longevity+, 250 mg works alongside five other actives rather than as a single high dose.

How long until Urolithin A works?
Research observed benefits over roughly 8–16 weeks of consistent daily use, not days.

Is Urolithin A safe?
Human studies reported it was well tolerated, and the ingredient holds FDA-reviewed GRAS (Generally Recognized As Safe) status. If you are pregnant, nursing, or on medication, talk to your healthcare provider first.

Explore NAO Longevity+ — 250 mg Urolithin A plus five longevity compounds, third-party tested, vegan. See the formula and current price →

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.