Echinacea Extract Assay: Polyphenols 4%,included caftaric acid,chicoric acid,chlorogenic aci,and echinacoside ,UV/HPLC Origin: Echinacea purpurea, Appearance: Brown to brownish-yellow powder Usage: Echinacea makes our own immune cells more efficient in attacking bacteria,viruses and abnormal cells,including cancer cells.