Leaf & Herb · Other

Grape Seed Extract (95% OPCs)

Provisional Strong Scorebotanical

Hermetica Superfood Encyclopedia

Published March 18, 2026Last updated March 18, 2026Methodology · Editorial policy · Report an error

Evidence review status: unreviewed

Legacy index-continuity record: the score and narrative are provisional and must not be represented as validated or human-approved.

Review flags: AWAITING_SEMANTIC_VALIDATION

Provisional Summary

Grape seed extract contains 95% oligomeric proanthocyanidins (OPCs) that strengthen blood vessel walls by increasing collagen synthesis and inhibiting collagen breakdown. These powerful antioxidants reduce oxidative stress by up to 30% while improving cardiovascular function through enhanced nitric oxide production.

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Screened PMID Records

Reported Benefits

Pending

Synergy Review

At a Glance

CategoryLeaf & Herb

GroupOther

Public Score StatusProvisional Strong

Primary Keywordgrape seed extract benefits

Grape Seed Extract (95% OPCs) — botanical close-up

Reported Benefits (Provisional)

Enhances cardiovascular health by improving blood vessel elasticity, leading to better circulation and lower blood pressure. Studies show a 15% reduction in blood pressure. - Provides strong antioxidant protection by neutralizing free radicals, reducing oxidative stress by up to 30%. This supports overall cellular health. - Supports skin health by promoting collagen synthesis, which improves skin texture and firmness. - Boosts immune function by enhancing the activity of natural killer cells, aiding in the body's defense against pathogens. - Improves cognitive function by increasing blood flow to the brain, which enhances memory and concentration. - Reduces inflammation by inhibiting inflammatory cytokines, which can alleviate symptoms of chronic conditions like arthritis. - Supports weight management by enhancing metabolism and reducing fat absorption.

Origin & History

Natural habitat

Grape Seed Extract, standardized to 95% oligomeric proanthocyanidins (OPCs), is derived from the seeds of Vitis vinifera grapes. The seeds are processed to extract potent antioxidants known for their health benefits.

“Used in traditional European medicine for its healing and protective properties. Gained recognition in modern times for its potent antioxidant effects.”Traditional Medicine

Research Narrative (Provisional)

Numerous studies, including RCTs, support its role in cardiovascular health and antioxidant protection. Research highlights its benefits for skin and cognitive function.

Preparation & Dosage

Dosage guidance is withheld because the publication gate has not recorded adequate support for this profile.

Nutritional Profile

- High in oligomeric proanthocyanidins (OPCs). - Contains flavonoids and phenolic compounds. - Provides essential nutrients like vitamin E and linoleic acid.

Reported Mechanism (Provisional)

Mechanism of Action

OPCs in grape seed extract stabilize collagen and elastin in blood vessel walls by inhibiting elastase and hyaluronidase enzymes. They enhance endothelial nitric oxide synthase activity, increasing nitric oxide production for vasodilation. The proanthocyanidins also scavenge reactive oxygen species through their phenolic hydroxyl groups, protecting cellular membranes from lipid peroxidation.

Clinical Narrative (Provisional)

Multiple randomized controlled trials involving over 400 participants show grape seed extract reduces systolic blood pressure by 6-15 mmHg in prehypertensive adults. A 12-week study of 119 subjects found 300mg daily improved endothelial function and reduced oxidative stress markers by 30%. Smaller studies suggest benefits for chronic venous insufficiency and wound healing, though larger trials are needed to confirm these effects.

Also Known As

Vitis vinifera seed extractOPCsProanthocyanidin extractGrape pip extractLeucoanthocyanidinsProcyanidolic oligomersPCOs

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These statements have not been evaluated by the Food and Drug Administration. This content is for informational purposes only and is not intended to diagnose, treat, cure, or prevent any disease.

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