... Name:Vitis Vinifera L. 2.Specifications:95%OPC, 95%polyphenols. powders. 3.HACCP,ISO9001,HALAL,FDA,CIQ,etc. CAS ... -red powderOdor & TasteCharacteristic Assay(UV/HPLC)95%OPC,90%polyphenols,95%polyphenolsLoss on Drying≤5.0%Ignition Residue≤5. ... extracting grape seed constituents has been for chemicalsknown as polyphenols having antioxidant activity in vitro.Grape seed extract consists ...