Objective: To study the effect of Vit C and glutathione (GSH) and Qin Mei KFJ on the cytotoxicity and DNA damage and the valent state of chromium in human embryo lung(HEL) cells induced by K 2Cr 2O 7(Cr 6+ ). Methods: Thiazolyl blue tetrazolium bromide (MTT) method and single cell gel electrophoresis (SCGE) and atomic absorption were adopted to study the cytotoxicity and DNA damage and the valent state of chromium. Results: Qin Mei KFJ could antagonize the cytotoxicity induced by K 2Cr 2O 7 effec...