Resveratrol in the UK: What It Is, How People Take It & How to Choose

Jul 21, 2026

8 min read

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Resveratrol is the compound that launched a thousand "red wine is good for you" headlines — and it's now a staple of the longevity supplement shelf. This guide is the honest version: what resveratrol is, what's in a formula like ours, which claims are actually allowed, and how to choose a quality product in the UK.

Let's be upfront. In the UK, resveratrol is sold as a food supplement — not a medicine. Food supplements cannot claim to treat, prevent or cure any condition, and resveratrol and quercetin have no authorised health claims. So we won't tell you what they "do" — including the anti-ageing and heart talk you'll see online. Where a formula contains a nutrient that does carry an authorised claim — here, the added vitamin C, zinc and vitamin D — we'll point it out.

What is resveratrol?

Resveratrol is a polyphenol (specifically a stilbene) that plants make as a defence compound. It's found in the skins of red grapes — hence the red-wine association — but the amount in wine is tiny. Supplements use a concentrated source, most commonly Japanese knotweed (Polygonum cuspidatum), standardised to trans-resveratrol, the more studied form. Ours provides 500 mg of trans-resveratrol standardised to 98%.

What's in our 5-in-1 — and the authorised claims

Our formula pairs trans-resveratrol and quercetin (a companion polyphenol) with three nutrients that carry authorised claims — usefully, two of them cover the "antioxidant" theme people associate with resveratrol:

Vitamin C

75mg · 94% NRV

protection of cells from oxidative stress; normal immune function

Zinc

9mg · 90% NRV

protection of cells from oxidative stress; normal immune function

Vitamin D

4µg · 80% NRV

normal immune function; normal muscle & bones

Vitamin C and zinc both contribute to the protection of cells from oxidative stress — a genuine, label-checkable claim. The trans-resveratrol (500mg) and quercetin (350mg) are included as recognisable ingredients we can't make claims for.

How people take resveratrol

General information only — follow your product's label. Resveratrol is fat-soluble, so it's typically taken with a meal that contains some fat. Ours is a two-capsule daily serving. Trans-resveratrol is the form most products (and studies) use.

Safety & who should be cautious

Check first if you take medication. Resveratrol and quercetin can interact with some medicines (including blood thinners and drugs processed by the liver). If you take any medication, are pregnant or breastfeeding, or manage a health condition, speak to your GP or pharmacist before supplementing.

How to choose a quality resveratrol supplement

Trans-resveratrol, standardised. Look for a stated trans-resveratrol amount and a high standardisation (e.g. 98%), not just "resveratrol".
Sensible companions. Quercetin is a common pairing; added vitamin C, zinc and D bring their own authorised claims.
Third-party testing with a Certificate of Analysis available.
Clean label, full disclosure, GMP manufacture, reputable UK seller — and no anti-ageing promises.

Humming Herbs Resveratrol

A 5-in-1 pairing 500 mg trans-resveratrol (98%) and quercetin with vitamin C, zinc and vitamin D — vitamin C and zinc contributing to the protection of cells from oxidative stress. 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 C, zinc and vitamin D.
PubMed — research literature on trans-resveratrol (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. Resveratrol and quercetin may interact with some medicines — if you take medication, are pregnant or breastfeeding, or manage a health condition, speak to your GP or pharmacist first. Keep out of reach of children.