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Best Pterostilbene Supplement UK: Buyer's Guide
Best Pterostilbene Supplement UK
A practical UK buyer's guide to choosing a pterostilbene supplement — the milligrams per serving, the purity, how it compares with resveratrol on value, and how to judge testing. Pterostilbene is sold as a food supplement in the UK.
Last updated July 2026 · Written by Vitality Supplements Editorial Team · How to choose · 7 min read
Food supplement information — not medical advice
UK manufactured
ISO/IEC 17025 batch tested
200mg per serving
CoA on request
Quick answer
How do I choose the best pterostilbene supplement in the UK?
Judge a pterostilbene supplement on the milligrams of pterostilbene per serving (commonly 100–200 mg), a stated purity (ideally 98%+), and independent batch testing with a Certificate of Analysis. Pterostilbene is a methylated relative of resveratrol, so some buyers compare the two on dose and price. Buy on verified content and testing, not on the biggest number on the label. Pterostilbene is sold as a food supplement in the UK with no authorised health claims.
Key takeaways
- The key figures are mg of pterostilbene per serving and the stated purity.
- Common servings are around 100–200 mg per day.
- Pterostilbene is a methylated analogue of resveratrol; buyers often compare the two on dose and value.
- Independent batch testing and a Certificate of Analysis matter more than marketing language.
- UK manufacture adds traceability and clearer labelling.
- Pterostilbene is a food supplement in the UK with no authorised health claims. For the science, see our what is pterostilbene guide.
The checklist
What to look for in a pterostilbene supplement
Pterostilbene is a single, well-defined compound, so buying well comes down to how much you get per serving, how pure it is, and whether the brand can prove it. Because pterostilbene and resveratrol are often mentioned together, it is worth understanding how they differ before you choose. For the underlying science, see our companion what is pterostilbene guide.
- A clear mg per serving — how much pterostilbene each serving provides, commonly 100–200 mg.
- A stated purity percentage — ideally 98%+ pterostilbene, not just "pterostilbene complex".
- Independent, accredited testing — batch tested by an ISO/IEC 17025-accredited laboratory.
- Certificate of Analysis on request — batch-level proof of content and purity.
- Clarity vs resveratrol — the label should be specific about which compound and how much, so you can compare fairly.
- Clean formulation — capsule with minimal fillers and clear allergen information.
- Honest value — compare cost per mg of pterostilbene across brands.
A precise mg-per-serving and a stated purity beat any headline number.
Side by side
Pterostilbene buying criteria compared
Use this scorecard when comparing pterostilbene products in the UK, including how a product stacks up against resveratrol on the practical points buyers care about.
| Buying criterion | What to look for | Why it matters |
|---|---|---|
| Dose per serving | Stated mg of pterostilbene (often 100–200mg) | Tells you what you are actually getting per serving |
| Purity | Pterostilbene stated at 98%+ | Lower-grade material can carry more impurities |
| Vs resveratrol | Specific compound and amount stated | Lets you compare pterostilbene and resveratrol fairly on dose and price |
| Testing | Batch tested by an ISO/IEC 17025 lab | Independently confirms identity and purity |
| Certificate of Analysis | Batch-specific, on request | Documentary proof of what is in the bottle |
| Formulation | Capsule, minimal excipients, allergen info | Cleaner product, easier to assess |
| Value | Cost per mg of pterostilbene | The fair way to compare across brands |
| Manufacture | UK-made to GMP | Traceability and clearer labelling |
How our product measures up
Why our pterostilbene meets the criteria
Our Premium Pterostilbene provides 200 mg of pterostilbene per serving (two capsules) across a 60-capsule bottle, and it is UK-manufactured. Every batch is independently tested by an ISO/IEC 17025-accredited laboratory for identity and purity, with a Certificate of Analysis available on request so you can verify the batch you receive.
We describe it by its specification — milligrams, purity, testing and origin — rather than by claimed effects, because pterostilbene is a food supplement with no authorised health claims. If you want the science first, read what is pterostilbene; to see how it fits alongside other options, see our best longevity supplements UK guide.
Buyer questions
Pterostilbene buying FAQ
Prioritise a clear mg of pterostilbene per serving, a stated purity (ideally 98%+), independent ISO/IEC 17025 testing and a Certificate of Analysis on request. UK manufacture and a sensible cost-per-mg round it out. These are quality and verification points, not health claims.
Common servings on the UK market are around 100–200 mg per day. What matters when comparing is that the label states the actual pterostilbene amount per serving. There is no official recommended intake, so this reflects what products offer rather than advice on how much to take.
Pterostilbene is a methylated analogue of resveratrol — a closely related but distinct compound. They are different molecules sold at different doses and prices, so which represents better value depends on the mg per serving, the purity and the price of each. Compare like for like on those points; our what is pterostilbene guide explains the chemistry.
Ask for a Certificate of Analysis for the batch and check that testing was carried out by an ISO/IEC 17025-accredited laboratory. The certificate should confirm the identity and purity of the pterostilbene. A brand that cannot provide one is asking you to take the label on trust.
UK manufacture does not by itself guarantee quality, but it usually means clearer labelling, GMP standards and easier traceability. Pair it with independent testing and a Certificate of Analysis for the strongest assurance.
Work out the cost per mg of pterostilbene, not the price of the bottle. Divide the price by the total milligrams in the pack (servings multiplied by mg per serving). A cheaper bottle with a lower dose or unstated purity is often worse value than it looks.
Pterostilbene, done properly
Our Premium Pterostilbene is 200mg per serving, 60 capsules, UK-manufactured and independently batch tested by an ISO/IEC 17025-accredited laboratory, with a Certificate of Analysis available on request.
Continue reading
About the author. This guide was written and reviewed by the Vitality Supplements Editorial Team, a UK supplement manufacturer. Every batch we produce is independently tested by an ISO/IEC 17025-accredited laboratory, with a Certificate of Analysis available on request.
This article is for general information about food supplements and is not medical advice. Pterostilbene is sold as a food supplement in the UK and carries no authorised health claims. Always consult a qualified healthcare professional before starting any supplement, particularly if you are under 18, pregnant, breastfeeding, taking medication or managing a health condition.
