Pterostilbene (Vaccinium angustifolium): Benefits, Dosage, Safety & Evidence

Questions fréquentes

How does pterostilbene work as an antioxidant?

Pterostilbene activates the Nrf2 signaling pathway, which triggers the production of endogenous antioxidant enzymes such as superoxide dismutase and glutathione peroxidase. As a methylated analog of resveratrol, it demonstrates superior lipophilicity, allowing enhanced cellular penetration and longer half-life in tissues. This mechanism supports its neuroprotective and cardioprotective effects. Evidence Level: C (preclinical studies support these mechanisms).

Does pterostilbene interact with blood thinners?

Pterostilbene may interact with anticoagulant medications such as warfarin, aspirin, and other blood thinners. The compound possesses mild antiplatelet properties that could theoretically increase bleeding risk when combined with these medications. Patients taking prescription blood thinners should consult their healthcare provider before supplementing with pterostilbene or consuming large quantities of wild blueberry extracts. Evidence Level: C (theoretical interaction based on pharmacological properties).

What is the recommended daily dosage for pterostilbene?

The typical recommended dosage for pterostilbene extract ranges from 50-250mg daily, often divided into two doses. Alternatively, consuming 1-2 cups of fresh wild blueberries provides dietary pterostilbene along with synergistic anthocyanins and flavonoids. Higher doses have been used in research settings, though long-term safety data above 250mg remains limited. Start with lower doses to assess tolerance. Evidence Level: C (based on available research and traditional use).

Is pterostilbene safe to take during pregnancy?

Pterostilbene from dietary sources such as wild blueberries is considered safe during pregnancy when consumed in normal food amounts. However, concentrated pterostilbene supplements lack sufficient safety data for pregnant or breastfeeding women. Pregnant women should prioritize whole food sources and consult their healthcare provider before taking pterostilbene supplements. Evidence Level: Traditional (safe as food), C (limited supplement data).

What are the cognitive benefits of pterostilbene?

Pterostilbene supports cognitive function through multiple pathways, including reducing oxidative stress in brain tissue, modulating neuroinflammation, and promoting healthy neuronal signaling. Traditional use in Northern indigenous diets and folk medicine emphasized cognitive support and eye health preservation. Preclinical research suggests potential benefits for memory and age-related cognitive decline, though human clinical trials remain limited. Evidence Level: C (preclinical evidence with traditional use support).

What is the difference between pterostilbene and resveratrol?

Pterostilbene is a methylated analog of resveratrol, meaning it has additional methyl groups that enhance its bioavailability. Pterostilbene demonstrates approximately 4-fold greater cellular uptake and a significantly longer half-life compared to resveratrol, due to its lipophilic nature. Both compounds offer antioxidant and neuroprotective benefits, but pterostilbene's superior absorption makes it potentially more effective at lower doses. Evidence Level: C (comparative pharmacokinetic studies).

Fiche d'information compilée à partir de PubMed

Cette fiche a été compilée à partir de résumés PubMed (NIH) avec l'assistance d'une IA. Chaque affirmation factuelle est citée par un article PubMed réel (voir la liste des sources). Elle n'a pas encore été révisée par un humain — confirmez auprès d'un professionnel de santé avant utilisation.

Compilé à partir de 30 articles PubMed · modèle : gemma4:31b

Résumé

Pterostilbene is a naturally occurring dimethylated analog of resveratrol found primarily in blueberries that exhibits potent antioxidant, anti-inflammatory, and anticancer properties [PMID:22099605, PMID:32064876]. It is characterized by higher bioavailability and metabolic stability compared to resveratrol [PMID:23808710, PMID:29315886].

Contexte

Pterostilbene (trans-3,5-dimethoxy-4-hydroxystilbene) is a phenolic compound and stilbenoid primarily found in blueberries (Vaccinium angustifolium), as well as peanuts and grapes [PMID:22099605, PMID:39329921].

Composés actifs

The primary active compound is pterostilbene, a dimethyl ether analog of resveratrol [PMID:29315886, PMID:32125846].

Mécanisme d'action

Pterostilbene acts as an antioxidant and anti-inflammatory agent [PMID:39329921]. It inhibits cancer growth by altering the cell cycle, inducing apoptosis, and inhibiting metastasis [PMID:22099605]. It may modulate molecular targets including AMPK, Sirt1, NF-κB, PKC, Nrf2, and PPARs [PMID:34460268]. In obesity, it is associated with thermogenic activation in brown adipose tissue and the browning of white adipose tissue [PMID:37486219].

Preuves cliniques

Preuve CCancer

In vitro and in vivo models show inhibition of tumorigenesis, metastasis, and cancer growth through apoptosis induction and cell cycle alteration [PMID:22099605, PMID:31078746].

Preuve CDementia/Alzheimer's Disease

Animal models and human subjects suggest a neuroprotective role in preventing and treating dementia syndromes, with pterostilbene appearing more effective than resveratrol in combatting associated brain changes [PMID:29168580].

Preuve CMetabolic Syndrome/Obesity

Animal models demonstrate reduced weight gain, liver fat, plasma cholesterol, adiposity, and blood glucose [PMID:32125846, PMID:37486219].

Preuve DAcute Pancreatitis

In a Wistar rat model, pterostilbene showed potential for treating severe acute pancreatitis [PMID:27525946].

Preuve DFemale Reproductive Aging

In aged mice, short-term and long-term ingestion increased implantation and live birth rates and improved oocyte quality [PMID:40711451].

Preuve B

Sécurité et effets indésirables

Pterostilbene is generally considered safe for human consumption [PMID:29315886]. A clinical pilot study reported no adverse events or abnormalities in healthy participants receiving 10 or 100 mg/d over 12 weeks [PMID:40024751]. It is noted to have lower toxicity and fewer adverse effects than resveratrol [PMID:32064876].

Synthèse des preuves

The majority of evidence is based on in vitro studies, animal models, and review articles (Level C and D). There is limited clinical evidence in humans, including one small pilot RCT (Level B) regarding safety and miRNA expression.

Sources PubMed

1.PMID: 23808710 (2013) — Pterostilbene: Biomedical applications. · Critical reviews in clinical laboratory sciences
2.PMID: 29377302 (2018) — Vaccinium angustifolium (lowbush blueberry) leaf extract increases extravillous trophoblast cell migration and invasion in vitro. · Phytotherapy research : PTR
3.PMID: 29168580 (2018) — Resveratrol, pterostilbene, and dementia. · BioFactors (Oxford, England)
4.PMID: 32623832 (2020) — Into the wild blueberry (Vaccinium angustifolium) rhizosphere microbiota. · Environmental microbiology
5.PMID: 32125846 (2020) — Chemistry of Pterostilbene and Its Metabolic Effects. · Journal of agricultural and food chemistry

Pterostilbene

Sources et citations

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