Which is better, resveratrol or pterostilbene?

Reviewed and updated: 16 September 2026

Resveratrol or Pterostilbene: the Short Answer

If you are choosing between resveratrol or pterostilbene, the honest answer is that pterostilbene is the more stable of the two in the body, resveratrol is by far the better studied in people, and in a well built formula you do not actually have to pick one. They are close chemical cousins. Two small changes to the molecule give pterostilbene a longer stay in the bloodstream, while resveratrol carries almost all of the human research behind it. That is the whole comparison in three lines, and the rest of this guide explains why, with the numbers.

I get asked this a lot, usually by someone who has been reading about NAD and stilbenes and has landed on two supplement labels that look almost identical. So let me take you through where each one comes from, what the single structural difference actually does, what the studies have and have not shown, and how I decided to put both of them into one formula rather than choosing a side.

The Quick Answer

• What they are: two stilbenes, a family of plant compounds. Resveratrol comes mainly from grapes and Japanese knotweed. Pterostilbene comes mainly from blueberries and the Indian kino tree.
• The difference: pterostilbene is resveratrol with two of its three hydroxyl groups swapped for methoxy groups. That makes it more fat soluble and harder for the body to break down quickly.
• Is anything more powerful than resveratrol: pterostilbene is the name you will see, and it is more bioavailable rather than intrinsically stronger. Those are not the same claim.
• Who each suits: pick resveratrol if you want the compound with the deepest human research record. Pick pterostilbene if stability in the body is what you care about. Take both if you want the wider polyphenol profile, which is what most serious NAD formulas do.
• One honest caution: pterostilbene has never had a proper human pharmacokinetic study published, so the stability advantage rests largely on animal work. Anyone who tells you otherwise has not read the literature.

Is Anything More Powerful Than Resveratrol?

This is the question underneath the comparison for a lot of people, so let me answer it directly before we get into the chemistry.

The name you will find everywhere is pterostilbene, and the reason is almost always bioavailability rather than potency. Those two words get used interchangeably online and they mean quite different things. Potency is how much a molecule does per unit that reaches the target. Bioavailability is how much reaches the target at all. Pterostilbene's advantage, as far as anyone has actually measured it, is the second one. A molecule that survives longer in circulation can look stronger in a comparison without being a stronger molecule, and the honest framing is that pterostilbene is the more practical of the two to get into the bloodstream, not the more powerful of the two once it arrives.

Two other things come up in the same conversation and are worth separating out properly.

Quercetin. Quercetin is frequently mentioned in the same breath, but it is not a stilbene at all. It is a flavonol, a different class of polyphenol with a different skeleton, found in onions, capers, apples and tea. It is not a stronger resveratrol, it is a different compound that happens to sit in the same broad polyphenol family and to show up in the same supplement stacks. Like the stilbenes, it has modest oral bioavailability and is heavily conjugated after absorption. If you want the fuller picture on it, our piece on what a quercetin and nettle complex actually is goes through it. Including quercetin alongside stilbenes widens the polyphenol profile rather than upgrading it, which is exactly why our formula carries both.

NAD precursors. NMN and nicotinamide riboside come up constantly next to resveratrol, and they are a separate category, not a stronger version of the same thing. Stilbenes are polyphenols with their own behaviour in the body. NMN and NR are precursors the body uses in the NAD salvage pathway. They sit together in formulas because the sirtuin enzymes that drew researchers to resveratrol in the first place depend on NAD to function, so the two ideas are related, but calling one more powerful than the other is a category error. Our explainer on NMN vs NR, and which NAD precursor to choose covers that side, and what NAD is and why it matters sets out the underlying science.

So the honest verdict on "more powerful": pterostilbene is the better answer to the question as people usually mean it, quercetin is a different compound rather than a stronger one, NAD precursors are a different category entirely, and none of the four has a human trial demonstrating superiority over another at a matched dose. Be sceptical of any page that ranks them confidently.

Where Resveratrol Comes From

Resveratrol is a phytoalexin, which is a rather grand word for a defence compound. Plants make it when they are stressed, attacked by fungus or damaged, and grapevines are particularly good at it. That is why resveratrol first entered the public conversation through red wine in the early nineteen nineties, when researchers were trying to explain why the French seemed to eat a lot of rich food and still had comparatively low rates of heart trouble. The wine explanation turned out to be far too simple, but the compound itself stayed interesting.

Commercially, almost nobody extracts resveratrol from grapes anymore, because the yield is tiny. A glass of red wine contains somewhere in the region of one to two milligrams. To reach the amounts used in research you would need to drink an absurd quantity, which is a fact worth holding on to whenever you see wine and resveratrol mentioned in the same sentence. Instead, the supplement industry uses Polygonum cuspidatum, Japanese knotweed, a plant that concentrates resveratrol far more generously and which has a long history of use in traditional Chinese and Japanese practice under the name Hu Zhang.

One thing to know before you read a single label: resveratrol exists in two forms, cis and trans. Only the trans isomer is the stable, well researched one. A label that simply says "resveratrol" has not told you which you are buying, and that silence is usually deliberate. Look for the words trans-resveratrol.

Where Pterostilbene Comes From

Pterostilbene has a quieter history. It was first isolated from red sandalwood, and it is the compound that gives Pterocarpus marsupium, the Indian kino tree, much of its interest to researchers. That tree has been used in Ayurvedic practice for a very long time, traditionally as a bark and heartwood preparation. Pterostilbene also occurs naturally in blueberries, which is where most people first hear about it, though the amounts in fruit are small.

In plants, resveratrol is actually the precursor to pterostilbene. The plant makes resveratrol first, then methylates it. So pterostilbene is not a rival compound so much as a modified downstream version of the same molecule, a point Wang and Sang set out clearly in their review of the two (Wang and Sang, 2018, DOI 10.1002/biof.1410).

The Single Structural Difference That Explains Everything

Both molecules share the same skeleton: two aromatic rings joined by a short ethylene bridge. Resveratrol is trans-3,5,4'-trihydroxystilbene, meaning it carries three hydroxyl (OH) groups. Pterostilbene is trans-3,5-dimethoxy-4'-hydroxystilbene, meaning two of those hydroxyls have been replaced by methoxy (OCH3) groups. One hydroxyl remains.

That sounds like a footnote. It is not. Those two methyl groups change two properties at once.

Fat solubility. Methoxy groups are more lipophilic than hydroxyl groups, so pterostilbene passes through cell membranes more readily. This is the reason it is often described as having better membrane permeability.

Metabolic stability. This is the more important one. When your body wants to clear a polyphenol, it attaches a sulfate or a glucuronic acid group to a free hydroxyl and sends it to the kidneys. Resveratrol offers three such attachment points. Pterostilbene offers one. Fewer sites means slower clearance, which is exactly what Wang and Sang concluded: the dimethyl ether structure gives pterostilbene lower susceptibility to conjugation and therefore better metabolic stability.

What Actually Happens to Resveratrol After You Swallow It

This is where the comparison gets genuinely useful, because resveratrol has a reputation problem that most articles skate over.

In 2004 Walle and colleagues gave six human volunteers a 25 mg dose of radiolabelled resveratrol and followed it. Absorption was excellent: at least seventy per cent of the dose was taken up. But when they looked for unchanged resveratrol in plasma, they found less than five nanograms per millilitre, essentially trace amounts. Almost the entire dose had already been converted into sulfate and glucuronide conjugates before it reached general circulation, and the authors identified that rapid sulfate conjugation in the gut and liver as the rate limiting step (Walle and colleagues, 2004, DOI 10.1124/dmd.104.000885).

So resveratrol is well absorbed and poorly bioavailable at the same time. Those are two different things, and confusing them is the single most common error in supplement writing. It is also the same confusion that sits underneath the "more powerful" question at the top of this page.

Higher doses do push more unchanged compound through. In a phase one dose escalation in forty healthy volunteers taking single doses between half a gram and five grams, peak plasma concentrations of unchanged resveratrol ranged from roughly 73 to 539 nanograms per millilitre, while the sulfate conjugate ran eighteen to twenty times higher than the parent compound. A single 500 mg oral dose has been reported to lift free resveratrol to around 71 nanograms per millilitre, against under five nanograms from a 25 mg dietary sized dose.

What Happens to Pterostilbene

The picture looks better on paper, with an important caveat I will come to.

Yeo and colleagues ran a careful pharmacokinetic study of pterostilbene in rats and found something practical. Given as a plain oral suspension at 15 mg/kg, bioavailability was about 15.9 per cent. Given to fasted animals, it collapsed to under 5.5 per cent. Given in a properly solubilised formulation, it rose to about 59.2 per cent. They also compared the two compounds directly and concluded that the pharmacokinetics of pterostilbene were more favourable than resveratrol (Yeo and colleagues, 2013, DOI 10.1002/mnfr.201200651).

Notice the fasting result, because it is the most useful line in this whole guide for anyone actually taking a capsule. Solubility is the bottleneck for pterostilbene, and an empty stomach makes it worse. Take stilbenes with food.

Different animal comparisons put the gap at different sizes, and I would rather show you the spread than pick the flattering number. One fourteen day rat study reported around eighty per cent oral bioavailability for pterostilbene against roughly twenty per cent for resveratrol (Pan and colleagues, BioFactors, 2018). Another comparison put pterostilbene's absolute bioavailability at about 12.5 per cent against roughly 1.5 per cent for resveratrol (Peng and colleagues, BioFactors, 2018). The ratio favours pterostilbene in both. The absolute numbers are nowhere near agreement, because dose, formulation and species all move them. When you see a single confident figure quoted online for how much more bioavailable pterostilbene is, that figure has been picked out of a range this wide.

The Honest Gap Nobody Mentions

Here is the part that gets left out of almost every "pterostilbene is superior" article you will read.

Wang and Sang, reviewing the whole field, put it plainly: compared with the extensive pharmacokinetic work done on resveratrol in humans, no pharmacokinetic investigation of pterostilbene had been performed in humans, and further studies were warranted. The bioavailability advantage that sells pterostilbene is built almost entirely on rodent data and on the chemistry, which is reasonable but is not the same as a measurement in people.

There is one human signal worth knowing, and it points the other way. Hougee and colleagues gave healthy volunteers 450 mg of a pterostilbene-containing Pterocarpus marsupium extract. Serum pterostilbene did rise, and no extract related adverse events occurred, but the concentrations reached were around five times lower than the levels that had been active in their laboratory work (Hougee and colleagues, 2005, DOI 10.1055/s-2005-864130). The dose that does something in a dish is not automatically the dose that arrives in your blood.

I would rather you knew that before buying anything, mine included.

What the Research Has Actually Studied

Both compounds sit in the same broad research area. Laboratory work has looked at their behaviour as antioxidants, at how they influence cell signalling, and at their interaction with the sirtuin enzymes, which is where the connection to NAD and why it matters comes in. Sirtuins depend on NAD to function, and resveratrol's early fame came from work suggesting it could influence sirtuin activity, which is precisely why stilbenes and NAD precursors ended up in the same capsule in the first place.

I want to be careful here, and I would ask you to be sceptical of anyone who is not. A great deal of this work is in cells and animals. Where human trials exist, they are often small, short, and mixed in their findings. That is the state of the evidence, and dressing it up would not do you any favours. If you want my fuller view on where the human evidence for this whole category currently stands, I set it out in is NMN worth taking.

How Much of Each Has Been Used in Studies

Resveratrol. Human work spans an enormous range. Dietary sized doses of 25 mg have been used in absorption studies. Trials have gone up to five grams a day. In one study, forty healthy volunteers took twenty-nine daily doses at 0.5, 1.0, 2.5 or 5.0 grams. It was tolerated, but the 2.5 and 5 gram doses produced mild to moderate gastrointestinal symptoms. Most commercial UK supplements sit between 50 and 500 mg per serving, well below the level where those symptoms appeared.

Pterostilbene. The reference point most often cited is a randomised, double blind, placebo controlled trial in eighty healthy volunteers running six to eight weeks, which supported pterostilbene being generally safe for use in humans at doses up to 250 mg per day. Commercial doses are usually far lower, commonly 25 to 100 mg, and if you want the four trial arms broken down properly along with a checklist for working out your own daily total, I have set that out in how much pterostilbene to take a day.

There is also a six month, randomised, double blind, placebo controlled trial of nicotinamide riboside combined with pterostilbene in 111 adults with a liver condition. It is the longest human trial of this pairing I am aware of. The combination appeared safe and well tolerated, and I will give you the result as the authors did: the primary endpoint was not met (Dellinger and colleagues, 2023, DOI 10.1002/hep.32778). Some secondary markers moved, which is interesting but is not the same as a positive trial.

Why Both Sit in One Formula, at Different Amounts

When we built NMN Fusion Pro I had to make exactly this decision, and I did not make it by picking a winner.

The formula carries 100 mg of trans-resveratrol from Japanese knotweed and 50 mg of pterostilbene. The trans is specified because, as I said earlier, a label that does not specify the isomer has told you nothing. The pterostilbene sits at half the resveratrol amount deliberately, and the reason is the chemistry above: it is more fat soluble and slower for the body to clear, so a smaller amount is doing a comparable job. The dose follows the pharmacology rather than the marketing. Matching them one to one would have looked more impressive on the pouch and made less sense.

Alongside them sit 125 mg of quercetin, which is a flavonol rather than a stilbenoid, so it widens the polyphenol profile instead of duplicating what is already there, plus 500 mg of NMN, 500 mg of TMG, 100 mg of CoQ10 and 5 mg of piperine. Every quantity is printed per serving rather than hidden inside a proprietary blend, which matters more than it sounds. A blend labelled "800 mg polyphenol complex" could be 780 mg of the cheap ingredient and 20 mg of the expensive one, and you would have no way to tell. If you want the fuller reasoning on how the stilbenes and the methyl donor fit together, I go through it in NMN with TMG and resveratrol, and when to take it.

View NMN Fusion Pro

Which One Suits Which Reader

• You want the compound with the most human data. Resveratrol, comfortably. It has multi-gram dose escalation studies, repeat dosing pharmacokinetics and a large body of trial work. Pterostilbene does not.
• You care most about how long a compound survives in the body. Pterostilbene, on the strength of its chemistry and the animal pharmacokinetics.
• You react poorly to larger polyphenol doses. The gastrointestinal grumbling reported in resveratrol studies showed up at multi-gram doses, not at the 100 to 250 mg range typical of UK supplements. If you are sensitive, start at the lower end of whatever you buy.
• You are building an NAD focused routine. Take both. That is what the better formulas do, and the reason is coverage rather than any one compound being the answer.
• You want to spend as little as possible. Resveratrol is cheaper per milligram. Pterostilbene is one of the more expensive ingredients in any stilbene formula, which is precisely why so many products leave it out or include a token amount.

Are They Ever Combined, and Is That Sensible?

Yes, routinely, and I think it is sensible for a straightforward reason. They are not identical in how they are absorbed, how quickly they are cleared, or which tissues they reach. Combining them gives you two different pharmacokinetic profiles from the same structural family rather than a double dose of one profile.

What I would not claim is that the combination has been shown to be better than either alone in humans. Direct head to head human comparisons of resveratrol against pterostilbene at matched doses are essentially absent from the literature. The best human evidence on a pterostilbene combination is the six month trial mentioned above, and its primary endpoint was not met. Combining them is a reasonable formulation decision. It is not a demonstrated advantage.

How to Judge a Stilbene Product

Six things I would check, in this order.

• Does the label say trans-resveratrol? If it just says resveratrol, you do not know which isomer you have.
• Is the pterostilbene quantity declared separately? Not inside a blend. A named milligram figure or nothing.
• Is the source named? Japanese knotweed for resveratrol is standard and perfectly good. Vagueness is not.
• Is the amount honest against the research? Pterostilbene at 5 mg is decoration. The human safety work sits at up to 250 mg per day, and useful commercial doses start around 25 to 50 mg.
• Is it formulated to be taken with food? Both compounds are fat soluble and pterostilbene's absorption fell sharply when animals were fasted. A product that tells you to take it on an empty stomach has not thought about this.
• Is purity actually tested? Ours is formulated in the UK and tested for purity and heavy metals at our GMP-certified facility.

If reading labels properly is a habit you want to build, I wrote a longer piece on why bioavailability matters in supplements that goes through the same logic across other ingredients.

How to Take Them

Three practical points, all of which follow from the pharmacology rather than from habit.

With food, and ideally a meal containing some fat. This is the single clearest lesson from the pterostilbene pharmacokinetics, where fasting dropped bioavailability below 5.5 per cent.

Consistently rather than occasionally. Resveratrol's half life after repeated dosing extends considerably compared with a single dose, so daily use produces a steadier picture than sporadic use.

Time of day matters less than most people think. There is no good human evidence favouring morning or evening for either compound. Pick the meal you never skip and attach it to that.

A Few Cautions Worth Knowing

These are the ones I would want a member of my own family to know.

• Blood thinning and antiplatelet medication. Stilbenes have been studied for effects on platelet behaviour. If you take warfarin, apixaban, clopidogrel, aspirin or any similar medicine, speak to your GP or pharmacist before adding a stilbene supplement.
• Surgery. For the same reason, tell your surgical team about any supplement you take and follow their advice on stopping beforehand.
• Other medication generally. Polyphenols can interact with the liver enzymes that process many drugs. If you take regular medication, particularly for the heart, for hormone related conditions or for immune suppression, check with a pharmacist first.
• Pregnancy and breastfeeding. Not suitable. There is not enough evidence to support use, so the sensible answer is no.
• Under eighteens. Not suitable.
• Large doses. The gastrointestinal symptoms reported in resveratrol trials appeared at multi-gram intakes. There is no good reason for a healthy adult to go anywhere near those amounts.
• If something feels wrong, stop and ask. A supplement is never worth pushing through symptoms for.

What to Realistically Expect

Nothing dramatic, and I would be wary of anyone who promises otherwise. These are food supplements, taken daily, in a context where the human evidence is still developing. People take them because they find the underlying research interesting and because they would rather cover a nutritional base than not, which is a perfectly reasonable position. It is a different position from expecting a noticeable change, and it is worth being clear with yourself about which one you hold before you spend money.

What you can reasonably expect from a good product is transparency: named isomers, declared quantities, a sensible dose that reflects the research rather than the price list, and honest testing. That much you should insist on. You can browse the rest of our supplement guides if you want to work through other ingredients the same way, or start with the NMN buyer's guide if a stilbene sits inside a wider NAD formula you are considering. Everything we make is listed at Pure Vitamins UK.

Frequently Asked Questions

What is more powerful than resveratrol?

Pterostilbene is the compound usually named, and the reason is bioavailability rather than potency. It is more fat soluble and slower for the body to clear, so more of it stays in circulation. That is not the same as being a stronger molecule, and no human trial has compared the two at matched doses.

Is pterostilbene just a stronger version of resveratrol?

Not exactly. It is a methylated version of the same molecule, which makes it more fat soluble and slower to be cleared. That is a difference in stability rather than in strength. Laboratory and animal work has often found pterostilbene more active at equivalent doses, but no human pharmacokinetic study of pterostilbene has been published, so the comparison in people remains open.

Is quercetin stronger than resveratrol?

They are not really comparable. Quercetin is a flavonol rather than a stilbene, so it is a different class of polyphenol with its own behaviour, not an upgraded resveratrol. Formulas that carry both are widening the polyphenol profile rather than substituting one for the other.

Are NMN and NR more powerful than resveratrol?

They are a different category. NMN and nicotinamide riboside are precursors used in the NAD salvage pathway, while resveratrol and pterostilbene are polyphenols. They appear together in formulas because the sirtuin enzymes depend on NAD, not because one is a stronger version of the other.

Can I take resveratrol and pterostilbene together?

Yes, and most well built NAD formulas include both. They come from the same structural family but behave differently once absorbed, so taking both gives broader coverage than doubling either one. Combining them has not been shown to be better than either alone in a human trial.

How much resveratrol is in a glass of red wine?

Roughly one to two milligrams. That is a fraction of what supplement research uses, which is why the wine explanation for resveratrol's early reputation never really held up.

Does pterostilbene need to be taken with food?

It is strongly advisable. In rats, giving pterostilbene to fasted animals dropped bioavailability to under 5.5 per cent, against about 15.9 per cent in a fed oral suspension. Both compounds are fat soluble, so a meal helps.

What does trans-resveratrol mean and does it matter?

Resveratrol exists as two isomers, cis and trans. The trans form is the stable one and the one used in essentially all the research. It matters enough that a label declining to specify should make you suspicious.

Is pterostilbene safe to take every day?

A randomised, double blind, placebo controlled trial in eighty healthy volunteers over six to eight weeks supported pterostilbene being generally safe at up to 250 mg per day, and typical supplement doses sit well below that. It is not suitable during pregnancy or breastfeeding, or for anyone under eighteen, and anyone on blood thinning medication should speak to a pharmacist first.

Which should I buy if I can only afford one?

Resveratrol, on evidence depth and cost per milligram. But check that it says trans-resveratrol and that the amount is declared, because a cheap product with an unnamed isomer is not a saving.

Sources

• Wang P, Sang S. Metabolism and pharmacokinetics of resveratrol and pterostilbene. BioFactors, 2018. DOI 10.1002/biof.1410. PubMed record
• Walle T, Hsieh F, DeLegge MH, Oatis JE, Walle UK. High absorption but very low bioavailability of oral resveratrol in humans. Drug Metabolism and Disposition, 2004. DOI 10.1124/dmd.104.000885. PubMed record
• Yeo SCM, Ho PC, Lin HS. Pharmacokinetics of pterostilbene in Sprague-Dawley rats. Molecular Nutrition & Food Research, 2013. DOI 10.1002/mnfr.201200651. PubMed record
• Hougee S, Faber J, Sanders A, et al. Selective COX-2 inhibition by a Pterocarpus marsupium extract characterised by pterostilbene, and its activity in healthy human volunteers. Planta Medica, 2005. DOI 10.1055/s-2005-864130. PubMed record
• Dellinger RW, Holmes HE, Hu-Seliger T, et al. Nicotinamide riboside and pterostilbene: a double-blind, placebo-controlled clinical trial. Hepatology, 2023. DOI 10.1002/hep.32778. PubMed record

Warmly,
Dr. Miron, Founder of Pure Vitamins UK

A food supplement is not a substitute for a varied, balanced diet and a healthy lifestyle. This article is for general information and is not medical advice. If you take medication, have a medical condition, or are pregnant or breastfeeding, speak to your GP or pharmacist before starting any new supplement.