Pterostilbene
pterostilbene
A resveratrol relative with better absorption, often paired with NMN or NR.
TypeSupplement / dietary
The grade answers: What does the human evidence support for: Sirtuin / antioxidant activity?
Grade
C
Limited
The grade rates evidence quality — it is not advice to take or buy.
- Class
- Polyphenol
- Primary use
- Sirtuin / antioxidant activity
- Evidence strength
- low
- Last reviewed
- 2026-07-01
Bottom line
More bioavailable than resveratrol on paper, but with far less human data of its own. Frequently bundled with NAD⁺ precursors on theory, not on outcome evidence.
What the evidence says
Pterostilbene is a methylated analogue of resveratrol found in blueberries, with better oral bioavailability and a longer half-life — which is often used to argue it's 'resveratrol done right'. The problem is that improved pharmacokinetics haven't been matched by a comparable body of human outcome trials; the clinical evidence is small and mixed (some effect on cholesterol and blood pressure, with a possible LDL-raising signal at higher doses). It's commonly sold combined with NR/NMN based on mechanism rather than proven synergy. Grade C: better absorption, thin human proof.
Key studies
- [1]
Pterostilbene human trial (blood pressure, lipids) · RCT
Some cardiovascular-marker effects; possible LDL rise at higher dose.
Open on PubMed ↗ - [2]
Pterostilbene vs resveratrol bioavailability · pharmacokinetic
Better absorbed and longer-lasting than resveratrol.
Open on PubMed ↗ - [3]
Mechanism
Proposed SIRT1 activation and antioxidant effects similar to resveratrol, with greater metabolic stability and cell membrane permeability.
Safety
Limited long-term human safety data; some trials noted increases in LDL cholesterol at higher doses, so it isn't automatically benign. Generally well tolerated short-term.
Dosage context
Human trials have used roughly 50–125 mg/day. Optimal dose and any real benefit of NMN/NR co-formulation are not established by outcome data.
Examples of application
- Taken ~50–125 mg/day, often bundled with NMN/NR.
- Watched for a possible LDL rise at higher doses.
- Better absorbed than resveratrol, but with far less human data.
From the field
Pterostilbene is 'resveratrol with better PK' — which fixes the absorption complaint without supplying the missing human outcomes. We grade it C and note the LDL signal the bundled products rarely mention.