Skip to main content
Supplement ScienceSupplementScience

Types of Grape Seed Extract: Forms & Bioavailability

Evidence:Moderate
·

This content is for informational purposes only and does not constitute medical advice. Statements about dietary supplements have not been evaluated by the FDA and are not intended to diagnose, treat, cure, or prevent any disease. Individual results may vary — consult your healthcare provider before starting any supplement. Full disclaimer

Forms Comparison

FormBioavailabilityBest For
Standardized OPC Extract (95%)HighMost potent — standardized to 95% OPCs; the form used in most clinical trials
Whole Grape Seed ExtractModerateBroader spectrum — contains additional polyphenols beyond OPCs; lower concentration
Grape Seed OilLow (for OPCs)Cooking/topical — rich in linoleic acid but contains minimal OPCs; not suitable for cardiovascular supplementation

Standardized OPC Extract (95%)

Bioavailability: High. Best for: Most potent — standardized to 95% OPCs; the form used in most clinical trials.

Whole Grape Seed Extract

Bioavailability: Moderate. Best for: Broader spectrum — contains additional polyphenols beyond OPCs; lower concentration.

Grape Seed Oil

Bioavailability: Low (for OPCs). Best for: Cooking/topical — rich in linoleic acid but contains minimal OPCs; not suitable for cardiovascular supplementation.

Full Grape Seed Extract Guide

References

  1. Meta-analysisZhang H, Liu S, Li L, Liu S, Liu S, Mi J, Tian G (2016). The impact of grape seed extract treatment on blood pressure changes: A meta-analysis of 16 randomized controlled trials. Medicine. DOI PubMed
  2. Meta-analysisFeringa HH, Laskey DA, Dickson JE, Coleman CI (2011). The effect of grape seed extract on cardiovascular risk markers: a meta-analysis of randomized controlled trials. Journal of the American Dietetic Association. DOI PubMed
  3. Meta-analysisFoshati S, Rouhani MH, Amani R (2021). The effect of grape seed extract supplementation on oxidative stress and inflammation: A systematic review and meta-analysis of controlled trials.. International journal of clinical practice. DOI PubMed
  4. Meta-analysisAsbaghi O, Nazarian B, Reiner Ž, Amirani E, et al. (2020). The effects of grape seed extract on glycemic control, serum lipoproteins, inflammation, and body weight: A systematic review and meta-analysis of randomized controlled trials.. Phytotherapy research : PTR. DOI PubMed
  5. ReviewGrohmann T, Litts C, Horgan G, Zhang X, et al. (2021). Efficacy of Bilberry and Grape Seed Extract Supplement Interventions to Improve Glucose and Cholesterol Metabolism and Blood Pressure in Different Populations-A Systematic Review of the Literature.. Nutrients. DOI PubMed
  6. ReviewDelimont NM, Carlson BN (2020). Prevention of dental caries by grape seed extract supplementation: A systematic review.. Nutrition and health. DOI PubMed
  7. ReviewOlaku OO, Ojukwu MO, Zia FZ, White JD (2015). The Role of Grape Seed Extract in the Treatment of Chemo/Radiotherapy Induced Toxicity: A Systematic Review of Preclinical Studies.. Nutrition and cancer. DOI PubMed
Show 5 more references
  1. Chen B, Li Y, Li Z, Hu X, et al. (2025). Vitamin E ameliorates blood cholesterol level and alters gut microbiota composition: A randomized controlled trial.. Nutrition, metabolism, and cardiovascular diseases : NMCD. DOI PubMed
  2. RCTLira A, Boyer W, Gillum T, Sullivan S, et al. (2025). Effect of 7-day dietary supplementation with grape seed extract on cardiac autonomic and hemodynamic responses in elevated and stage 1 hypertension.. Clinical physiology and functional imaging. DOI PubMed
  3. RCTEshaghian N, Sadeghi O, Foroghi A, Khorvash F, et al. (2025). Effects of grape seed extract supplementation on inflammatory biomarkers, oxidative stress, clinical symptoms, and quality of life in patients with migraine: A double-blinded randomized placebo-controlled clinical trial.. Journal of research in medical sciences : the official journal of Isfahan University of Medical Sciences. DOI PubMed
  4. Meta-analysisAbdulla SA, Abdalla BA, Muhammed AA, Elawamy HA, et al. (2025). The Impact of Antioxidant Adjuncts on Periodontal Health in Type 2 Diabetes Patients: A Meta-Analysis.. Clinical and experimental dental research. DOI PubMed
  5. RCTGhanbari P, Raiesi D, Alboebadi R, Zarejavid A, et al. (2024). The effects of grape seed extract supplementation on cardiovascular risk factors, liver enzymes and hepatic steatosis in patients with non-alcoholic fatty liver disease: a randomised, double-blind, placebo-controlled study.. BMC complementary medicine and therapies. DOI PubMed