25% Anthocyanosides. Supports Vision. Vegan/Vegetarian. Non-GMO. Bilberry + Grapeskin Polyphenols is a synergistic blend of standardized flavonoid antioxidants. The Swedish bilberry extractcontains 25% polyphenols as anthocyanosides. The red grapeskin extract contains 25% polyphenols includinganthochyanins. These flavonoids support vision by enhancing antioxidant status in the eye and reducing capillary permeability and fragility.