Urolithin A in the UK: What It Is, How People Take It & How to Choose a Supplement

Jul 21, 2026

10 min read

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Urolithin A is one of the buzziest names in the "longevity" supplement world — and one of the most over-hyped. This guide is the honest version: what urolithin A actually is, what's in a formula like ours, which claims are genuinely allowed, and how to choose a quality product in the UK.

Let's be upfront. In the UK, urolithin A is sold as a food supplement — not a medicine. Food supplements cannot legally claim to treat, prevent or cure any condition, and urolithin A has no authorised health claim. You'll see it discussed in relation to cells, mitochondria and ageing; we're not able to turn any of that into a claim, and we won't. Where a formula contains a nutrient that does carry an authorised claim — here, the added vitamin D3 and vitamin B12 — we'll say so.

What is urolithin A?

Urolithin A is a postbiotic — a compound the gut microbiome produces when it breaks down ellagitannins, the polyphenols found in foods like pomegranate, walnuts and some berries. Interestingly, not everyone's gut bacteria make it efficiently, which is part of why a standardised supplement form exists. As a supplement it's produced to a defined purity rather than extracted from fruit.

What's in our 6-in-1 formula

Each one-capsule serving combines urolithin A with five companions. Two of them — the added vitamins — carry authorised claims; the others are included as recognisable ingredients we can't make claims for:

Urolithin A

250mg — a postbiotic (a metabolite of pomegranate ellagitannins)

CoQ10

150mg — ubiquinone

Trans-Resveratrol

150mg — from Japanese knotweed

PQQ

10mg — pyrroloquinoline quinone

Vitamin D3 ✓

4µg · 80% NRV — authorised claims

Vitamin B12 ✓

2µg · 80% NRV — authorised claims

The vitamins that carry authorised claims

Both added vitamins are present above the 15% NRV threshold, so these apply:

Vitamin D contributes to the normal function of the immune system and to normal muscle function.
Vitamin B12 contributes to the reduction of tiredness and fatigue and to normal energy-yielding metabolism.

These belong to the vitamins, not to urolithin A — but they're genuine, label-checkable benefits of the formula.

How people take urolithin A

General information only — follow your product's label. Urolithin A is typically taken once daily; ours is a one-capsule serving providing 250 mg. It's often taken with food as part of a daily routine.

A note on the regulatory picture

Buy from a transparent seller. Urolithin A is a relatively new supplement ingredient. As with any newer ingredient, it's worth buying from a company that's clear about what's in the product and how it's tested — and that doesn't lean on dramatic anti-ageing promises, which aren't permitted.

How to choose a quality product

Stated strength. A clear urolithin A amount per serving and a declared purity.
Sensible companions — added vitamins (like D3 and B12) that bring their own authorised claims.
Third-party testing with a Certificate of Analysis available.
Clean label, full disclosure, GMP manufacture, reputable UK seller with no anti-ageing hype.

Humming Herbs Urolithin A

A 6-in-1 formula pairing 250 mg urolithin A with CoQ10, PQQ, resveratrol and added vitamin D3 and B12 — the vitamins contributing to immune function and the reduction of tiredness and fatigue respectively. Third-party tested; full Supplement Facts on the product page.

References & further reading

Great Britain Nutrition and Health Claims (NHC) Register — the authorised claims for vitamin D and vitamin B12.
PubMed — research literature on urolithin A (background reading; not a substantiation of any health claim).

Important: This article is for general information only and is not medical advice. Food supplements are not a substitute for a varied, balanced diet and a healthy lifestyle, and are not intended to diagnose, treat, cure or prevent any disease. If you are pregnant, breastfeeding, taking medication or managing a health condition, speak to your GP or pharmacist before taking any new supplement. Keep out of reach of children.