The incidence of precancerous lesions in the M + L P group was decreased , and the levels of ROS unit , SOD , GSH2Px in the blood were higher , but the content of MDA was decreased.

• 结果:M 组和M + L P 组大鼠食管和前胃均发生癌前病变,而M + L P 组大鼠癌前病变发生率低于M 组;