This looks like something’s missing — it’s the opposite. Ellagic acid sits in grape skins, not seeds, so finding none confirms this extract is made from seeds alone, not bulked out with cheaper skin material. A mark of authenticity, not a gap.
No single purity % is given because OPCs are natural chains of varying length — there’s nothing fixed to measure against. NMR confirms what the material is; the 95%+ OPC level is verified separately by UV assay.
Certified By
Limbach Analytics GmbH
Arotop Laboratorien Mainz
DAkkS-accredited · DIN EN ISO/IEC 17025:2018
🏆
What the Analysis Confirmed
StructureMatches OPC (three-ring form)
Significant impurities✓ None detected
Ellagic acid marker✓ Not detectable — confirms seed origin
Most of your resveratrol never arrives. This does.
Resveratrol earned its reputation by activating SIRT1, the primary repair pathway your cells rely on as they age. The catch is delivery: most of a standard resveratrol capsule is broken down during digestion before it can help. Found naturally in blueberries, pterostilbene is resveratrol's close molecular cousin, built by nature to get through. Same cellular switch. Four times the delivery. One small daily capsule.
Resveratrol's open secret: you pay for 500 mg, your cells get 100
Only about a fifth of a standard resveratrol capsule survives digestion. Your gut and liver break down the rest before it ever reaches your bloodstream, which is why standard resveratrol requires bulky 500 mg doses, and why so many people take it for years without being sure it is doing anything. The molecule works. The delivery doesn't.
The Upgrade
Same family. Built by nature to get through.
Pterostilbene (pronounced tero-STILL-bean) is what happens when nature makes two small structural changes to resveratrol. Those changes make it fat-soluble, allowing it to slip smoothly through your gut wall and into your cells instead of being broken down along the way. It absorbs at roughly four times the rate of resveratrol and stays active in your bloodstream around seven times longer, making 100 mg of pure pterostilbene a serious, highly effective daily dose.
Active for hours, not minutes
Stays circulating several times longer for sustained cellular support.
Four times more gets through
Roughly 80% reaches the bloodstream, compared with about 20% for standard resveratrol in preclinical data.
Reaches the brain
Crosses the blood–brain barrier, a rare advantage for a polyphenol.
Born in blueberries
One capsule holds more pure pterostilbene than well over 100 kg of fresh blueberries.
100 mg
Trans-pterostilbene
Latest batch lab-tested at 99.6% purity.
100 mg
Organic grape seed extract
Verified seed-only, standardised to 95%+ OPCs.
Full Transparency
Why ours comes with grape seed extract, and most don't
Pterostilbene has one known quirk: in its published human clinical trial (80 adults over 6 to 8 weeks), people who took pure pterostilbene on its own saw their LDL cholesterol creep up slightly. However, participants in that same study who took pterostilbene alongside a grape extract experienced no LDL increase at all.
That is why we don't sell pterostilbene in isolation. Every capsule of Pterostilbene Extreme pairs 100 mg of pure trans-pterostilbene with 100 mg of organic, seed-only grape seed extract standardised to 95%+ OPCs, powerful grape antioxidants backed by 16 human trials of their own for healthy blood pressure and circulation. Two active ingredients, each with a clear job, and nothing else in the capsule. That is what "Extreme" means: the complete formula, not the convenient one.
Switches on SIRT1, the pathway your cells use for DNA repair, energy efficiency, and resilience as you age, with far more of the active compound arriving to do the job.
02
Brain and focus
Crosses the blood–brain barrier to reach neural tissues where most polyphenols cannot go. Researchers are actively studying pterostilbene for memory, focus, and mood support as we age.
03
Heart and circulation
Delivers targeted antioxidant support for your blood vessels. Grape seed extract is backed by 16 human trials for healthy blood flow and blood pressure, while clinical research on pterostilbene at 250 mg daily also demonstrated blood pressure support.
04
Everyday antioxidant defence
Both ingredients are potent antioxidants studied for how they help cells cope with daily oxidative stress, delivering protection that actually reaches your tissues.
Right for you if:
You take resveratrol and want more of every dose to count
You want one well-researched daily capsule to start or anchor your longevity routine, not a 12-ingredient label
You already take Pure NMN or another NAD+ booster and want to activate the SIRT1 pathway it feeds
Long-term brain sharpness and circulation matter to you as much as cellular ageing
What's Inside
Two ingredients. Nothing to hide.
100 mg
Trans-pterostilbene
99%+ pure trans-form, the exact bioactive form used in scientific research, independently verified at 99.6% purity.
100 mg
Organic grape seed extract
Seed-only, organic extract standardised to 95%+ OPCs, the researched grape polyphenols that balance the formula, with no cheaper grape skin or pomace material.
Clean vegan capsule: vegan pullulan. No fillers, no flow agents, and no magnesium stearate. That is the whole label.
Every batch tested by independent ISO/IEC 17025-accredited laboratories
Formulated in
Switzerland
1
Daily Routine
One capsule. Any time of day.
1 capsule a day, 90 days per bottle. Take it at any time of day, with or without food. Because pterostilbene is fat-soluble, taking it alongside a meal with a little healthy fat, such as eggs, olive oil, or nuts, helps absorption slightly, though it isn't required.
Want more? You can take 2 capsules a day (200 mg total; 45 days per bottle). Never exceed two capsules a day, keeping safely below the 250 mg top daily dose used in human clinical research.
Two stilbenes, different routes in, plus senolytics for our most comprehensive polyphenol stack.
Why Trust It
Tested. Verified. Published.
Formulated in Switzerland. Every batch is tested by independent, ISO/IEC 17025-accredited laboratories, and we publish the certificates directly on the product page.
In animal bioavailability studies, about 80% of an oral dose of pterostilbene reaches the bloodstream, against about 20% for resveratrol.
80 adults
In a human trial of 80 adults over 6–8 weeks, pterostilbene was well tolerated at 100–250 mg a day. Taken alone it raised LDL cholesterol; taken with grape extract, it didn't.
16 trials
Across 16 human trials at 100–2,000 mg a day, grape seed extract lowered blood pressure by a modest amount.
Customer Reviews
What Nutriop customers are saying
Pterostilbene Extreme has a small but growing review base. Here's what we're hearing, plus what Nutriop customers report across our broader polyphenol range.
I've been taking resveratrol from Nutriop for about three weeks now, and I have to say I'm very satisfied. While illnesses are spreading among my friends, I continue to feel full of strength and energy.
Jakub K. · Video review · Loox · Resveratrol + Quercetin
★★★★★
I have been taking Nutriop Resveratrol for only 2 weeks now. I have had no side effects and seem to feel good. Order was easy and came on time. Will be ordering again.
Really enjoying this supplement, have realised since taking it my cardio fitness seems to higher than normal and after taking it i feel relaxed and super focussed. Super quick delivery, will definitely purchase from nutriop again :)
j
j.l.k.
very good
J
Jose Brito
NPS score:
0 (Not at all likely)
10 (Extremely likely)
Likes:Not much
Improvements:Quicker postage
Review
It’s a shame that I haven’t used the product. I ordered it 17 days ago and have not received it.
Reviews in Other Languages
J
Javier Rodríguez
NPS score:
0 (Not at all likely)
10 (Extremely likely)
Nutriop Longevity® Pterostilbene Extreme with 100% Pure Organic Grape Seed Extract - 100mg Capsules (x90)
Your Questions
Fair questions. Straight answers.
Can't I just eat blueberries?
Please do. But one capsule holds more pterostilbene than well over 100 kg of fresh blueberries. Food gives you the flavour and trace nutrients; the capsule gives you the longevity dose.
I already take resveratrol. Do I need this too?
They work well together, or you can switch. Resveratrol has the longer research record; pterostilbene gets far more of itself into your bloodstream and your brain. Choosing just one? Pterostilbene Extreme gives you more active compound per capsule, which is why so many customers switch.
Isn't 100 mg low compared with a 500 mg resveratrol capsule?
No, because 80% of 100 mg beats 20% of 500 mg, and pterostilbene stays active in your body several times longer. The milligram number on the label isn't the number in your blood.
I've read that pterostilbene can raise cholesterol. What's the grape seed extract for?
Pterostilbene taken on its own can nudge LDL cholesterol up slightly. In the published human study, taking it alongside grape extract prevented that increase, so we built 100 mg of organic, seed-only grape seed extract (95%+ OPCs) into every capsule. Nothing extra for you to think about.
Is it safe to take every day? Are there any interactions?
Yes. In the human safety study, pterostilbene was well tolerated at up to 250 mg a day, more than our two-capsule maximum, with no adverse effect on liver, kidney, or blood-sugar markers. Check with your doctor before use if you take blood thinners, cholesterol medication, or blood-pressure medication, or if you are pregnant or breastfeeding.
When will I notice something?
Because this is cellular protection rather than a pick-me-up, you won't feel a stimulant jolt. Some people report clearer focus within a few weeks; the real return builds over months. That's what the 90-day guarantee is for.
Is it vegan?
Yes, 100% vegan. The capsule is made from vegan pullulan, with no animal gelatine and no fillers.
What does "Extreme" mean?
The complete formula: pure trans-pterostilbene plus the organic grape seed extract that balances it, not just standalone pterostilbene.
Why does it cost less than your other formulas?
Two ingredients, one capsule a day, and 90 days in a bottle: it is simpler to produce than multi-ingredient stacks, so it costs less. Same accredited labs, same 90-day guarantee.
Can I take it with Pure NMN or the rest of the range?
Yes. Pure NMN supplies the NAD+ fuel and pterostilbene flips the SIRT1 switch that uses it, making them a classic pairing. It also stacks seamlessly with Pure Spermidine, COGNIPRIME®, and Resveratrol PLUS.
How fast will it arrive?
Dispatched quickly with tracked delivery from Switzerland.Tracked priority shipping.
What if it isn't for me?
You are covered by our 90-Day Money-Back Guarantee. Try the full bottle for three months, and if you aren't satisfied, email us for a full refund.
Your Offer
90 days of the longevity switch. $0.44 a day.
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The maths:$0.44 a day one-time, or $0.33 a day subscribed, less than a cup of coffee a week, and the simplest place to start your longevity routine.
90-Day Money-Back Guarantee
Try it for a full three months. Not satisfied? Email us for a complete refund. We'll ask what you experienced so we can keep improving, but we won't make it difficult. That's the deal.
Four times the delivery. One capsule. Zero compromises.
Everything resveratrol is known for, with far more of it reaching your cells, paired with the organic grape seed extract that makes the formula complete. Formulated in Switzerland, independently lab-tested, and guaranteed for 90 days.
Food supplements are not a substitute for a varied and balanced diet and a healthy lifestyle. Do not exceed the recommended daily dose. Keep out of reach of children. Consult a healthcare professional before use if pregnant, nursing, or taking medication.
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Pterostilbene Extreme
Download pterostilbene certificate
MS Bioanalytical · Oct 2025
Download grape seed certificate
Limbach Analytics / Arotop Laboratorien · Jun 2026
