According to the diagnosis standard for endemic arseniasis ( WS/T 211-2001 ) , 62 cases of arseniasis patients who resided in endemic arseniasis area in Guizhou province were selected and divided stratified randomly into two groups : rosa roxburghii tratt juice treatment group and superoxide dismutase ( SOD ) - enriched rosa roxburghii tratt juice treatment group , with 31 patients in each group.Each patient took 120 ml/d rosa roxburghii tratt preparation or SOD-enriched rosa roxburghii tratt orally for one month .