Pterostilbene

non-nutrient/non-botanical

What is it

Pterostilbene is a naturally occurring stilbene compound found primarily in blueberries and the heartwood of certain trees. Structurally similar to resveratrol but with two methoxy groups, pterostilbene has substantially better oral bioavailability and a longer half-life.

How it works

Pterostilbene is a dimethylated analog of resveratrol. The two methoxy substitutions make it more lipophilic, less susceptible to phase II conjugation in the gut and liver, and significantly better absorbed orally. Estimates suggest pterostilbene has roughly four times the bioavailability and a substantially longer half-life than resveratrol. Mechanistically, pterostilbene shares many of resveratrol's reported effects. It is a potent antioxidant, modulates sirtuin and AMPK pathways, and has anti-inflammatory effects through inhibition of NF-kB signaling. Preclinical studies suggest effects on lipid metabolism, glucose homeostasis, and cellular stress response pathways. Despite the bioavailability advantage, clinical evidence for pterostilbene in humans is much more limited than for resveratrol. Most data come from cell culture and animal studies, with only a small number of human trials.

Evidence for 5 uses

AI-assisted evidence assessment — talk to your doctor before relying on any single supplement.

Cardiovascular and lipid markers

Grade D

Mixed evidence

A few small clinical trials suggest pterostilbene may lower blood pressure modestly, but results have been mixed and some studies showed increased LDL cholesterol at higher doses. Evidence is too limited to support routine cardiovascular use.

Glucose and metabolic markers

Grade F

Limited evidence

Preclinical studies suggest pterostilbene may improve glucose tolerance and insulin sensitivity, but robust human evidence is lacking.

Antioxidant and anti-inflammatory effects

Grade F

Limited evidence

Mechanistic studies and animal data are extensive, but human clinical evidence for measurable antioxidant or anti-inflammatory benefits is very limited.

Cognitive function

Grade F

Limited evidence

Animal studies suggest possible neuroprotective and cognitive effects, but human studies are essentially absent.

NAD+ support (combined with NMN/NR)

Grade F

Limited evidence

Often combined with NMN or NR in 'longevity' formulas based on theoretical sirtuin activation. There is no human evidence that the combination improves any meaningful health outcome.

2 commercial forms

Trans-pterostilbene

The biologically active isomer; most supplements use this form.

Often standardized to 98%+ purity and may be derived from blueberries or synthesized.

Pterostilbene combined with NMN or NR

Combined for theoretical synergy in NAD+ and sirtuin pathways.

Popular in 'longevity' products; combined clinical evidence is lacking.

Dosage

There is no RDA for pterostilbene. Most human studies have used 50 to 250 mg per day, with 100 mg per day being a commonly studied dose. Higher doses (250 to 500 mg) have been used but offer no clear additional benefit and may raise LDL cholesterol.

When and how to take it

WHEN: Pterostilbene does not have strict timing requirements. Taking it consistently at the same time daily helps maintain steady blood levels. HOW: Taking with a fat-containing meal may improve absorption as pterostilbene is lipophilic. Splitting larger doses into morning and evening can support more even tissue exposure, though pterostilbene's longer half-life makes once-daily dosing reasonable.

Food sources

Food	Amount	%DV
Blueberries	1 cup	—
Cranberries	1 cup	—
Grapes (some varieties)	1 cup	—

Safety

Pterostilbene appears generally well tolerated at typical supplement doses. The most notable concern from clinical trials is a possible increase in LDL cholesterol at doses of 250 mg per day, particularly without concurrent dietary supplementation. There is no established Tolerable Upper Intake Level. Long-term safety beyond 12 weeks of use is not well characterized.

Who should be cautious

Pregnant and breastfeeding women should avoid pterostilbene due to insufficient safety data. People with elevated LDL cholesterol should be cautious at doses of 250 mg or higher. Those on blood thinners or scheduled for surgery should consult a clinician. People with hormone-sensitive conditions should consider its potential stilbene-related estrogenic activity.

Interactions

Pterostilbene may inhibit certain cytochrome P450 enzymes and could affect the metabolism of medications processed through these pathways. It has theoretical antiplatelet effects and may potentiate anticoagulants. Specific clinically meaningful drug interactions are not well documented due to limited research.

Frequently asked questions

How is pterostilbene different from resveratrol?⌄

Pterostilbene has two methoxy groups instead of resveratrol's hydroxyls. This makes it more lipophilic, much better absorbed orally, and longer-lasting in the body. Many of its proposed mechanisms overlap with resveratrol.

Is pterostilbene better than resveratrol?⌄

Bioavailability is clearly better, but clinical evidence in humans is much weaker for pterostilbene than for resveratrol. Most claims are based on preclinical research.

Why is pterostilbene often paired with NMN?⌄

Both are marketed for longevity through sirtuin and NAD+ pathways. The pairing is theoretical; human evidence that the combination produces measurable longevity or healthspan benefits does not exist.

Are there side effects?⌄

Generally well tolerated. The main observed concern is a possible increase in LDL cholesterol at higher doses (250 mg/day or more). Long-term safety beyond a few months is not well studied.

What dose should I take?⌄

Most human studies have used 50 to 100 mg daily. Higher doses are not clearly more beneficial and may raise LDL cholesterol.

References

Wikidata: Pterostilbene — Wikidata link
PubChem: Pterostilbene (CID 5281727) — PubChem link

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Disclaimer: These statements have not been evaluated by the FDA. This page is educational, not a substitute for personalized medical advice. Evidence grades are AI-assisted assessments — talk to your doctor before starting any new supplement, especially if you're pregnant, breastfeeding, on medications, or managing a chronic condition.