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Pterostilbene vs Resveratrol: Key Differences
Pterostilbene vs Resveratrol
A clear, factual comparison of two closely related plant compounds — pterostilbene and resveratrol. This guide looks only at their chemistry, how well each is absorbed (a neutral pharmacokinetic point), typical serving sizes, natural food sources and cost. It makes no health claims for either.
Last updated July 2026 · Written by Vitality Supplements Editorial Team · ~2,100 words · 8 min read
Food supplement information — not medical advice
UK manufactured
ISO/IEC 17025 batch tested
Certificate of Analysis on request
Factual, no health claims
Quick answer
Which should you choose?
Pterostilbene and resveratrol are chemically close relatives. Both are stilbenoids — plant polyphenols — and pterostilbene is essentially a dimethylated version of resveratrol (two of resveratrol's hydroxyl groups are replaced with methoxy groups). That structural change gives pterostilbene higher oral bioavailability, which is a neutral pharmacokinetic fact about absorption, not a health claim. Which you choose comes down to the specific molecule you want, the serving size and cost. This guide compares them factually on chemistry, absorption, dose, sources and price — it makes no claims about what either does in the body.
Key takeaways
- Both are stilbenoid plant polyphenols; pterostilbene is a dimethylated analogue of resveratrol.
- The structural difference gives pterostilbene higher oral bioavailability (a pharmacokinetic fact).
- Resveratrol is usually sold as trans-resveratrol; pterostilbene is a single defined molecule.
- Typical servings: pterostilbene commonly ~50–250mg; resveratrol commonly ~150–600mg.
- Sources differ: pterostilbene mainly from blueberries; resveratrol from grape skins and Japanese knotweed.
- Both are UK food supplements with no authorised health claims; pterostilbene usually costs more per gram.
Side by side
How they differ
Pterostilbene and resveratrol are often compared because they are structurally similar molecules from the same chemical family. The table below sets them next to each other on the factual points that distinguish them — chemistry, absorption, typical serving sizes, natural sources and relative cost. It deliberately says nothing about effects.
| Attribute | Pterostilbene | Resveratrol |
|---|---|---|
| What it is | A stilbenoid plant polyphenol; a dimethylated analogue of resveratrol | A stilbenoid plant polyphenol; usually sold as trans-resveratrol |
| Chemistry | Two hydroxyl groups of resveratrol are replaced by methoxy groups (dimethylated) | Has three hydroxyl groups; the parent structure pterostilbene is based on |
| Absorption (pharmacokinetics) | Higher oral bioavailability; the methoxy groups make it more lipophilic and slower to metabolise — a neutral PK fact | Lower oral bioavailability; extensively metabolised after absorption — a neutral PK fact |
| Natural sources | Mainly blueberries; also grapes and some other berries | Grape skins, red wine, peanuts and Japanese knotweed (a common extract source) |
| Typical serving on the market | Commonly ~50–250mg per day | Commonly ~150–600mg per day |
| Common form | A single defined molecule; capsules, sold by mg of pterostilbene | Usually trans-resveratrol; capsules, often paired with NMN |
| Relative cost | Generally more expensive per gram | Generally less expensive per gram |
| Testing that counts | HPLC purity and identity, with a Certificate of Analysis | HPLC for trans-resveratrol content, with a Certificate of Analysis |
Same chemical family, one small structural change — and a measurably different absorption profile.
Molecule one
What pterostilbene is
Pterostilbene is a stilbenoid — a type of plant polyphenol — and structurally it is a dimethylated analogue of resveratrol. In plain terms, take the resveratrol molecule and replace two of its hydroxyl (–OH) groups with methoxy (–OCH3) groups and you have pterostilbene. It is found most notably in blueberries, as well as grapes and some other berries.
That small structural change has one well-documented, neutral consequence: the methoxy groups make pterostilbene more lipophilic and slower for the body to metabolise, so it has higher oral bioavailability than resveratrol. This is a pharmacokinetic property — a statement about how much is absorbed — and not a claim about any health effect. As a supplement it is a single defined molecule, so the meaningful checks are identity and purity by HPLC, backed by a batch CoA. Typical servings on the market are around 50–250mg.
A resveratrol analogue
Its chemistry. A dimethylated version of resveratrol — two hydroxyl groups swapped for methoxy groups.
From blueberries
Main source. Found most notably in blueberries, and in grapes and some other berries.
Higher bioavailability
A PK fact. More lipophilic and slower to metabolise, so more is absorbed orally than resveratrol — not a health claim.
Costs more
Price note. Generally more expensive per gram than resveratrol; typical servings ~50–250mg.
Molecule two
What resveratrol is
Resveratrol is the better-known of the two — also a stilbenoid plant polyphenol, and the parent structure that pterostilbene is derived from. It has three hydroxyl groups where pterostilbene has two methoxy groups. In supplements it is almost always supplied as trans-resveratrol, the more stable and studied isomer, and it is frequently paired with NMN in combination products.
Resveratrol occurs naturally in grape skins, red wine, peanuts and, as a common commercial extract source, Japanese knotweed (Polygonum cuspidatum). Its absorption profile is the flip side of pterostilbene's: resveratrol has lower oral bioavailability because it is extensively metabolised after absorption — again, a neutral pharmacokinetic point, not a health claim. Typical servings on the market are around 150–600mg, and it generally costs less per gram than pterostilbene. For a fuller explainer, see our what is trans-resveratrol guide.
Resveratrol is the parent molecule — more familiar, more affordable, and usually sold as trans-resveratrol.
Trans
Preferred isomerSold as trans-resveratrol, the more stable, studied form.
Grapes
Natural sourceGrape skins, red wine and peanuts; extracts often from Japanese knotweed.
150–600mg
Common servingThe market norm per day — not a recommendation.
+NMN
Often pairedFrequently combined with NMN in one product.
Making the choice
Which is right for you
Because pterostilbene and resveratrol are close chemical relatives rather than the same molecule, choosing between them comes down to the specific compound you want, the absorption profile, the serving size and the cost. They are not the same ingredient, and one is not simply a “better” version of the other — they are two related options.
- If you specifically want pterostilbene, look for a stated mg of pterostilbene, high purity and HPLC testing with a Certificate of Analysis — and expect a higher price per gram.
- If you specifically want resveratrol, look for trans-resveratrol content (not just “resveratrol”), HPLC verification and a CoA — usually at a lower cost per gram.
- Note the absorption difference as a factual point: pterostilbene is more bioavailable, resveratrol less so — which is one reason their typical serving sizes differ.
- Compare like with like — the two are dosed differently, so match on the actual molecule and mg, not the headline number.
- For either, prefer UK manufacturing, clear labelling and independent, accredited testing; introduce one product at a time and speak to a healthcare professional first.
People researching these often look at them alongside other longevity supplements. For deeper single-ingredient explainers, see our what is pterostilbene and what is trans-resveratrol guides. The same principle applies to both: buy on verified content, not the biggest number on the label.
Common questions
Pterostilbene vs resveratrol FAQ
No, but they are close relatives. Both are stilbenoid plant polyphenols, and pterostilbene is a dimethylated analogue of resveratrol — two of resveratrol's hydroxyl groups are replaced by methoxy groups. They are distinct molecules with different absorption profiles and are dosed differently.
The methoxy groups in pterostilbene make the molecule more lipophilic (fat-soluble) and slower for the body to metabolise, so a larger proportion is absorbed when taken orally. This is a pharmacokinetic property — a statement about absorption — and not a claim about any health effect.
Pterostilbene is found most notably in blueberries, and in grapes and some other berries. Resveratrol occurs in grape skins, red wine and peanuts, and commercial resveratrol extracts are commonly sourced from Japanese knotweed.
On the market, pterostilbene is commonly sold at around 50–250mg per day and resveratrol at around 150–600mg per day. These figures reflect what products offer rather than recommended doses — there is no official RDA for either, so consult a healthcare professional before starting.
Pterostilbene is generally more expensive per gram than resveratrol. Resveratrol — usually sold as trans-resveratrol — is more widely produced and typically costs less. Cost is one of several practical factors to weigh alongside the molecule, dose and testing.
For pterostilbene: the mg of pterostilbene, a purity figure, HPLC testing and a Certificate of Analysis. For resveratrol: look for trans-resveratrol content specifically (not just “resveratrol”), with HPLC verification and a CoA. In both cases, independent accredited testing and clear UK labelling matter most.
Looking for pterostilbene?
Our Premium Pterostilbene is 200mg per serving, UK-manufactured and independently batch tested, with a Certificate of Analysis available on request.
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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 and resveratrol are sold as food supplements in the UK and carry no authorised health claims. This comparison describes what each molecule is, its chemistry and absorption, and how it is sourced and tested; it does not claim either has any effect on health or the body. 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. References available on our research references page.
