Pterostilbene
A methylated cousin of resveratrol found in blueberries with much better absorption; promising for metabolic and cognitive aging in animals, but human trials are few and one raised LDL cholesterol.
At a Glance
- Best known for
- Antioxidant and anti-inflammatory activity, Activates SIRT1 and AMPK pathways linked to longevity, Neuroprotective effects in animal models of cognitive decline
- Evidence
- Preliminary
- Typical dose
- 50–100 mg daily
- Type
- Compound
What is Pterostilbene?
Pterostilbene is a stilbene polyphenol produced by plants as a defense compound, found in small amounts in blueberries, grapes, and the bark of the Indian kino tree (Pterocarpus marsupium), which is where its name comes from. Structurally it is resveratrol with two of its hydroxyl groups replaced by methoxy groups. That small change makes it far more fat-soluble and much more resistant to the rapid breakdown that limits resveratrol, which is why it has attracted interest as a 'better resveratrol' for longevity, metabolic, and brain health research. Nearly all commercial pterostilbene is synthetic or derived from Pterocarpus.
Known Health Benefits
How It Works
Pterostilbene activates sirtuin-1 (SIRT1) and AMP-activated protein kinase (AMPK), two energy-sensing enzymes that regulate mitochondrial function, fat metabolism, and cellular stress responses. It also stimulates the Nrf2 pathway, which turns on the body's own antioxidant enzymes (glutathione peroxidase, superoxide dismutase), and suppresses NF-κB-driven inflammation. In the brain, animal studies show it reduces oxidative damage in the hippocampus and improves markers of synaptic plasticity. It activates PPAR-alpha in the liver, which in theory lowers triglycerides but may explain the LDL rise seen in humans. In cell studies it shows anti-cancer activity by inducing apoptosis and inhibiting proliferation, but these effects have not been tested clinically.
What Research Says
Most pterostilbene research is in cells and rodents, where it consistently improves memory in aged animals, reduces fasting glucose, and lowers markers of inflammation. Human data are limited to a handful of small trials. The best known is a 2014 randomized, double-blind trial of 80 adults with high cholesterol given 50–250 mg per day for 6–8 weeks. Blood pressure dropped modestly (about 7 mmHg systolic in the high-dose group), but LDL cholesterol rose in those taking pterostilbene alone, an unexpected finding that remains unexplained. A follow-up safety analysis found no liver, kidney, or blood count abnormalities. A small pilot combining pterostilbene with nicotinamide riboside (as a NAD+ booster) reported good tolerability but could not separate the two ingredients. There are no trials for cognitive decline in humans, so the brain health claims rest on animal data only.
Active Compounds
Pterostilbene (3,5-dimethoxy-4'-hydroxystilbene), a dimethylated analogue of resveratrol
Forms & Bioavailability
Pterostilbene's main advantage over resveratrol is absorption. In rats, oral bioavailability is roughly 80% compared with 20% for resveratrol, and its half-life is about 105 minutes versus 14 minutes for resveratrol. The two methoxy groups shield it from the rapid glucuronidation and sulfation that inactivate resveratrol in the gut wall and liver. It is fat-soluble, so taking it with a meal containing fat improves absorption further. Blood levels from food are negligible; you would need to eat many pounds of blueberries to match a single 50 mg capsule.
Dosage Guidance
| Use Case | Dosage |
|---|---|
| General antioxidant / longevity | 50–100 mg daily |
| Blood pressure support (studied) | 125 mg twice daily |
| Combined with NAD+ precursors | 50 mg with 250 mg nicotinamide riboside |
| Cognitive support (animal-based) | 50–100 mg daily |
Always consult a healthcare provider for personalized dosing.
Natural Food Sources
- Blueberries (about 100–500 ng per gram — far below supplement doses)
- Grapes and red wine (trace)
- Cranberries, lingonberries, bilberries
- Almonds (trace)
- Pterocarpus marsupium (Indian kino) bark — traditional Ayurvedic use
Potential Side Effects
Generally well tolerated; a 2014 trial found increased LDL cholesterol at 100–250 mg/day, especially in people not taking grape extract
Who Should Avoid It
- Elevated LDL cholesterol or familial hypercholesterolemia (LDL rose in the main human trial)
- Warfarin or other anticoagulants (possible CYP2C9 inhibition and antiplatelet effect)
- Scheduled surgery — stop 2 weeks before
- Hormone-sensitive cancers (stilbenes have weak estrogenic activity in some assays)
- Low blood pressure or blood pressure medication (additive effect)
Pregnancy & Lactation
There are no safety data for pterostilbene supplements in pregnancy or breastfeeding, and its estrogen-receptor activity in cell studies argues for caution. Avoid supplemental doses; blueberries and other food sources are of course fine.
Known Drug Interactions
May inhibit CYP2C9, CYP2C19 and CYP3A4 in lab studies (warfarin, some SSRIs, statins); additive effect with blood pressure and blood sugar drugs; theoretical antiplatelet effect with anticoagulants
Evidence Classification
Based on in vitro studies, animal models, pilot trials, or traditional use documentation. Clinical evidence is limited.
Frequently Asked Questions
Is pterostilbene better than resveratrol?
It is better absorbed and lasts longer in the body — roughly four times the bioavailability and seven times the half-life in animal studies. Whether that translates to better results in people is unknown, because resveratrol has far more human trials, and the one sizeable pterostilbene trial raised LDL cholesterol. Many longevity formulas combine both on the theory that they act on overlapping pathways.
Why did pterostilbene raise LDL cholesterol in the study?
Researchers suspect PPAR-alpha activation in the liver changed how cholesterol was packaged into lipoproteins. The rise was modest (about 10–20 mg/dL) and did not happen in the group that also took grape extract. If you take pterostilbene, especially above 100 mg daily, it is reasonable to check a lipid panel after 2–3 months.
Can I get pterostilbene from blueberries?
Only in trace amounts — a cup of blueberries contains a fraction of a milligram, versus 50–250 mg in supplements. Blueberries are still an excellent food for brain and heart health, but their benefits come from anthocyanins and overall polyphenol content, not pterostilbene specifically.
Does pterostilbene boost NAD+?
Not directly. It activates SIRT1, an enzyme that uses NAD+, so it is often paired with NAD+ precursors like nicotinamide riboside or NMN in the hope of a synergistic effect. The one human pilot of this combination showed modest NAD+ increases attributable to the nicotinamide riboside, with pterostilbene's contribution unclear.
References
- Pterostilbene on metabolic parameters: a randomized, double-blind, and placebo-controlled trial. Riche DM, McEwen CL, Riche KD, et al.. Evid Based Complement Alternat Med (2014)
- A review of pterostilbene antioxidant activity and disease modification. McCormack D, McFadden D. Oxid Med Cell Longev (2013)
- Pharmacometrics of pterostilbene: preclinical pharmacokinetics and metabolism, anticancer, antiinflammatory, antioxidant and analgesic activity. Remsberg CM, Yáñez JA, Ohgami Y, et al.. Phytother Res (2008)
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This entry is for educational purposes only. It is not medical advice. Always consult a qualified healthcare provider before starting, stopping, or changing any supplement regimen, especially if you take medications or have health conditions.