DESC: 25% Anthocyanosides • Supports and Protects Vision. Bilberry + Grapeskin Polyphenols is a synergistic blend of standardized flavonoid antioxidants. Swedish bilberries (100:1 extract) contain 25% polyphenols as anthocyanosides. Red Grapeskin extract contains 30% polyphenols including 4% anthocyanins. These flavonoids support and protect vision by enhancing antioxidant status in the eye and reducing capillary permeability and fragility.  .