... of ISO9001,KOSHER,GMP! More natural,more better life! Grape seed ExtractProduct Specification 95% OPC/ PolyphenolsLatin Name Vitis vinifera. ... oxygen molecules called free radicals.The most valuable flavonoids in grape seed extract are procyanidolic oligomers (also known as proanthocyanidins), ... -40%02 Resveratrol 20-98%03 Galanthamine HBr 99%04 Limonin 98%05 Gingko Biloba Extract CPh,USP,DAB, ...