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evidence · mechanism · dose
Supplements/Compound

Grape Seed Extract

Vitis vinifera procyanidins.

Cardiovascular HealthSkin, Hair & Nails

Overview

Vitis vinifera procyanidins.

Natural sources
    Common forms

      Mechanism of action

      Anti-inflammatory; collagen protection.

      Pathways

        Effects on the body

        Organ system effects

        Evidence-based benefits

        Lowers BP

        Moderate evidence

        Potential side effects

        Common
        • · GI upset
        Rare
          Serious

            Drug interactions

            No notable interactions reported.

            Supplement interactions

            Pairs well with

            None listed.

            Avoid combining with

            No specific avoidances listed.

            Dosing & bioavailability

            Typical dose
            150–300 mg

            Where to buy

            Affiliate-style search links to reputable retailers. We don't endorse specific brands — verify third-party testing (USP, NSF, Informed Sport) before purchase.

            Compound
            Grape Seed E…
            Amazon
            Wide selection · fast shipping
            Compound
            Grape Seed E…
            iHerb
            Global delivery · curated brands
            Compound
            Grape Seed E…
            Thorne
            Practitioner-grade · NSF tested

            Scientific evidence (8)

            Meta-analysisJ Am Diet Assoc · 2011

            Grape seed for BP

            Feringa HH, et al.

            9 RCTs

            Key findings

            Reduced systolic BP by 1.5 mmHg.

            Open study
            Systematic reviewPubMed (NLM) · 1970

            PubMed: Grape Seed Extract — Lowers BP

            Live PubMed search

            Live results for "Grape Seed Extract Lowers BP" across the PubMed/MEDLINE peer-reviewed index.

            Key findings

            Opens current human and preclinical literature matching Grape Seed Extract and "Lowers BP". Filter by RCT, meta-analysis, or year on the results page.

            Open study
            Systematic reviewPubMed (NLM) · 1970

            PubMed: Grape Seed Extract — randomized controlled trial

            Live PubMed search

            Live results for "Grape Seed Extract randomized controlled trial" across the PubMed/MEDLINE peer-reviewed index.

            Key findings

            Opens current human and preclinical literature matching Grape Seed Extract and "randomized controlled trial". Filter by RCT, meta-analysis, or year on the results page.

            Open study
            Systematic reviewPubMed (NLM) · 1970

            PubMed: Grape Seed Extract — meta-analysis

            Live PubMed search

            Live results for "Grape Seed Extract meta-analysis" across the PubMed/MEDLINE peer-reviewed index.

            Key findings

            Opens current human and preclinical literature matching Grape Seed Extract and "meta-analysis". Filter by RCT, meta-analysis, or year on the results page.

            Open study
            Systematic reviewPubMed (NLM) · 1970

            PubMed: Grape Seed Extract — pharmacokinetics

            Live PubMed search

            Live results for "Grape Seed Extract pharmacokinetics" across the PubMed/MEDLINE peer-reviewed index.

            Key findings

            Opens current human and preclinical literature matching Grape Seed Extract and "pharmacokinetics". Filter by RCT, meta-analysis, or year on the results page.

            Open study
            Systematic reviewPubMed (NLM) · 1970

            PubMed: Grape Seed Extract — safety adverse events

            Live PubMed search

            Live results for "Grape Seed Extract safety adverse events" across the PubMed/MEDLINE peer-reviewed index.

            Key findings

            Opens current human and preclinical literature matching Grape Seed Extract and "safety adverse events". Filter by RCT, meta-analysis, or year on the results page.

            Open study
            Systematic reviewPubMed (NLM) · 1970

            PubMed: Grape Seed Extract — dose response

            Live PubMed search

            Live results for "Grape Seed Extract dose response" across the PubMed/MEDLINE peer-reviewed index.

            Key findings

            Opens current human and preclinical literature matching Grape Seed Extract and "dose response". Filter by RCT, meta-analysis, or year on the results page.

            Open study
            Systematic reviewGoogle Scholar · 1970

            Google Scholar: Grape Seed Extract — clinical evidence

            Live Scholar search

            Cross-database citation index for Grape Seed Extract as it relates to "clinical evidence".

            Key findings

            Includes preprints, theses, and journal articles. Useful for tracking citation counts and follow-on work.

            Open study
            Educational use only. This profile is not medical advice. Consult a qualified healthcare professional before starting any supplement, especially if you take prescription medication or have a chronic condition.