Grape seed Extract 95% OPC/ polyphenols Product specification: 95% OPC/ polyphenols (UV-VIS) Latin name: vitis vinifera.L Product type: Light brown yellow powdered extract Part of the plant used: seed Extract method: Grain alcohol / water Grape seeds are an excellent source of oligomeric proanthocyanidins and have been the subject of clinical research in france for their antioxidant activity. antioxidants play an important role in the development of collagen including skin, connective tissue and vascular walls. Natural way standardized grape seed extract is a high potency(955) polyphenol extract.