Objective To study the relation between zinc and level of oxidative stress in HepG2. Methods Activity of SOD and contents of MDA in HepG2 are detected by adding different density of zinc sulfate to culture solution of hepatoma carcinoma cell to result in surrounding of hypso - zinc, and by adding different density of zinc chelating agent TPEN to culture solution of hepatoma carcinoma cell to result in surrounding of nulli - zinc. Restilt The activity of SOD increase and contents of MDA degrade with increasing of zinc density in HepG2. Condusion Zinc can increase activity of SOD and decrease co...