Commonly known as oligomeric proanthocyanidins (OPCs) – an antioxidant bioflavonoid found in grape seed, pine bark, wine, cranberries, and the leaves of bilberry and ginkgo. Reports suggest OPCs inhibit collagen, elastin, and hyaluronic acid degradation and lipid peroxidation, while increasing the cell membranes resistance to injury and degradation. See Grape Seed Extract, Pine.

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