# Pteropure (Pterostilbene)

**Canonical URL:** https://ingredients.hermeticasuperfoods.com/ingredients/pteropure
**Data Source:** Hermetica Superfoods Ingredient Encyclopedia
**Updated:** 2026-03-19
**Evidence Score:** 2 / 10
**Category:** Other
**Also Known As:** pterostilbene, trans-3,5-dimethoxy-4-hydroxystilbene, 4-[(E)-2-(3,5-dimethoxyphenyl)ethenyl]phenol, dimethylresveratrol, 3,5-dimethoxy-4'-hydroxystilbene, Indian kino tree extract, Vijaysar extract

## Overview

Pterostilbene is a naturally occurring stilbenoid compound found in blueberries that demonstrates potential [cardiovascular](/ingredients/condition/heart-health) and anti-cancer effects. This dimethylated analog of resveratrol shows superior bioavailability and may influence cholesterol [metabolism](/ingredients/condition/weight-management) and cellular signaling pathways.

## Health Benefits

• May support healthy cholesterol levels, though one RCT (n=80) showed increased [LDL cholesterol](/ingredients/condition/heart-health) alongside reduced blood pressure (moderate evidence from NCT01267227)
• Demonstrates potential anti-cancer properties, with a phase II trial (n=37) showing suppression of pro-tumorigenic pathways in endometrial cancer when combined with megestrol acetate (preliminary clinical evidence)
• Exhibits [anti-inflammatory](/ingredients/condition/inflammation) effects through inhibition of NF-κB and PI3K/Akt signaling pathways (primarily preclinical evidence)
• Shows promising [neuroprotective](/ingredients/condition/cognitive) potential for cognitive support based on animal models (preclinical evidence only)
• Offers superior bioavailability (80%) compared to resveratrol (20%), allowing for better tissue distribution (pharmacokinetic studies)

## Mechanism of Action

Pterostilbene activates sirtuins (SIRT1) and peroxisome proliferator-activated receptors (PPARα), influencing cellular [metabolism](/ingredients/condition/weight-management) and [longevity](/ingredients/condition/longevity) pathways. The compound modulates HMG-CoA reductase activity, affecting cholesterol synthesis, while also inhibiting NF-κB signaling to reduce [inflammatory](/ingredients/condition/inflammation) responses. Its dimethoxy structure provides enhanced cellular uptake and metabolic stability compared to resveratrol.

## Clinical Summary

A randomized controlled trial (NCT01267227) with 80 participants showed pterostilbene reduced systolic blood pressure by 7.8 mmHg but unexpectedly increased [LDL cholesterol](/ingredients/condition/heart-health) by 11 mg/dL at 250mg daily. A phase II cancer trial (n=37) demonstrated suppression of pro-tumorigenic pathways in endometrial tissue. Current clinical evidence is limited with mixed cardiovascular outcomes requiring further investigation. Most studies have used dosages between 125-250mg daily for 6-12 weeks.

## Nutritional Profile

Pterostilbene (trans-3,5-dimethoxy-4'-hydroxystilbene) is a naturally occurring stilbenoid and dimethylated analog of resveratrol, with a molecular weight of 256.30 g/mol. It is not a macronutrient or traditional micronutrient source; it is classified as a bioactive polyphenolic compound. Key nutritional and pharmacological profile details: • Primary bioactive compound: Pterostilbene (typically standardized to ≥95–99% purity in commercial supplements such as Pteropure®, derived from Pterocarpus marsupium heartwood). • Typical supplement dosage: 50–250 mg per capsule; clinical trials have used 50 mg twice daily (100 mg/day) and 125 mg twice daily (250 mg/day). • Natural dietary sources: Found in small quantities in blueberries (~0.03–0.52 µg/g fresh weight), grapes (Vitis vinifera), almonds, and certain Pterocarpus species; dietary intake from food alone is negligible compared to supplemental doses. • Bioavailability: Significantly superior oral bioavailability (~80% in animal models) compared to resveratrol (~20%), attributed to the two methoxy groups replacing hydroxyl groups, which increases lipophilicity (logP ~3.0 vs ~1.6 for resveratrol), enhances membrane permeability, and reduces phase II conjugation (glucuronidation and sulfation). Plasma half-life in humans is estimated at ~2–4 hours. • Key metabolites: Pterostilbene-4'-O-glucuronide and pterostilbene-4'-O-sulfate are the primary circulating metabolites; some mono-demethylated metabolites (yielding pinostilbene and resveratrol-like structures) have also been detected. • Contains no significant macronutrients (protein, fat, carbohydrate, fiber) at supplemental doses. • Contains no vitamins or minerals. • Mechanism-relevant chemical features: The 3,5-dimethoxy substitution pattern confers enhanced metabolic stability and cellular uptake relative to polyhydroxylated stilbenes; it acts as an activator of SIRT1, PPAR-α, and AMPK signaling pathways and exhibits potent [antioxidant activity](/ingredients/condition/antioxidant) (ORAC value substantially higher per mole than resveratrol in some in vitro assays). • Solubility: Poorly water-soluble (~24 µg/mL at 25°C); highly soluble in organic solvents (ethanol, DMSO); some formulations use cyclodextrin complexes or lipid-based delivery to enhance dissolution and absorption.

## Dosage & Preparation

Clinically studied doses include 50 mg twice daily (low dose) or 125 mg twice daily (high dose), with some trials using 50 mg pterostilbene combined with 100 mg grape extract twice daily for 6-8 weeks. Consult a healthcare provider before starting any new supplement.

## Safety & Drug Interactions

Pterostilbene appears generally well-tolerated in clinical trials with minimal reported adverse effects. The compound may interact with cholesterol-lowering medications due to its effects on HMG-CoA reductase and lipid [metabolism](/ingredients/condition/weight-management). Potential interactions with [blood pressure](/ingredients/condition/heart-health) medications should be monitored given its hypotensive effects. Safety during pregnancy and lactation has not been established, and individuals with bleeding disorders should exercise caution due to potential antiplatelet effects.

## Scientific Research

Clinical evidence includes a randomized, double-blind, placebo-controlled trial (n=80) testing pterostilbene safety over 6-8 weeks with no adverse effects on liver, kidney, or glucose markers (PMC3575612). A phase II trial in endometrial cancer (n=37, NCT03671811) showed pathway suppression with combination therapy. However, another RCT (NCT01267227, PMID: 25057276) reported increased [LDL cholesterol](/ingredients/condition/heart-health) despite blood pressure benefits.

## Historical & Cultural Context

While pterostilbene-rich extracts from Pterocarpus marsupium heartwood have been evaluated in modern trials, specific traditional medicine systems or historical uses were not documented in the clinical sources. The compound's presence in blueberries is noted, but traditional use documentation is lacking.

## Synergistic Combinations

Grape extract, resveratrol, quercetin, curcumin, omega-3 fatty acids

## Frequently Asked Questions

### What is the difference between pterostilbene and resveratrol?

Pterostilbene contains two methoxy groups that make it more lipophilic and bioavailable than resveratrol. Studies show pterostilbene has 80% oral bioavailability compared to resveratrol's 20%, with a longer half-life of 105 minutes versus 14 minutes.

### What dosage of pterostilbene is used in clinical studies?

Clinical trials have primarily used pterostilbene dosages between 125-250mg daily. The NCT01267227 cardiovascular study used 250mg daily, while cancer research has employed doses up to 800mg daily in shorter-term protocols.

### Does pterostilbene affect cholesterol levels?

Clinical evidence shows mixed effects on cholesterol. One RCT found pterostilbene increased LDL cholesterol by 11 mg/dL despite theoretical benefits for lipid metabolism. The mechanism involves HMG-CoA reductase modulation, but outcomes may vary individually.

### Can pterostilbene help with blood pressure?

A randomized trial demonstrated pterostilbene reduced systolic blood pressure by 7.8 mmHg at 250mg daily over 6-8 weeks. The mechanism likely involves nitric oxide pathways and endothelial function improvement, though more research is needed.

### What foods naturally contain pterostilbene?

Pterostilbene is found primarily in blueberries (0.99-1.59 μg/g fresh weight), with smaller amounts in grapes and almonds. Blueberries represent the richest natural dietary source, though supplement forms provide much higher concentrations than food sources alone.

### What is Pteropure and how does it differ from regular pterostilbene supplements?

Pteropure is a branded, standardized form of pterostilbene designed to ensure consistent potency and purity across batches. The branded formulation aims to provide reliable bioavailability compared to unbranded pterostilbene sources, though both contain the same active polyphenol compound. Pteropure is often used in clinical research and premium supplement formulations to guarantee quality and reproducibility.

### Is pterostilbene safe to take with blood pressure or cholesterol medications?

While pterostilbene has been studied for blood pressure and cholesterol support, you should consult your healthcare provider before combining it with antihypertensive or statin medications, as additive effects are possible. One clinical trial noted increased LDL cholesterol in some participants, which could theoretically interact with cholesterol-lowering drugs. Your doctor can assess individual risk factors and monitor relevant biomarkers if concurrent use is appropriate.

### What does current clinical evidence show about pterostilbene's anti-cancer potential?

A phase II trial (n=37) demonstrated that pterostilbene combined with megestrol acetate suppressed pro-tumorigenic pathways in endometrial cancer patients, representing preliminary but promising clinical evidence. However, this research is in early stages and limited to one specific cancer type and combination therapy context. Much more research is needed before pterostilbene can be considered an established cancer treatment or prevention strategy.

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*Source: Hermetica Superfoods Ingredient Encyclopedia — https://ingredients.hermeticasuperfoods.com*
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