... ,Certificate of ISO9001,KOSHER,GMP! More natural,more better life! Grape seed ExtractProduct Specification 95% OPC/ PolyphenolsLatin Name ... -like substances called prostaglandins, may benefit from the extract's ability to block the release of this pain- and inflammation-causing ... a natural antihistamine, grape seed extract may help to control the sneezing, congestion and other hallmarks of an allergic ...