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Standardized to 85% Total Polyphenols for Antioxidant Support for Capillary Strength and Venous ToneDietary SupplementVeganNon-GMOGrape Seed Extract contains oligomeric proanthocyanidins (OPCs). They are flavonoid-rich compounds with very potent antioxidant properties. OPCs have been found to inhibit lipid peroxidation and to effect enzyme systems including phospholipase A2 xanthine oxidase cycloxygenase and lipoxygenase. OPCs help maintain capillary strength and integrity and venous tone.