Objective To explore the impact of long-term consumption of soybean on the intestinal microbial, and to pro-vide a basis for the daily diet. Methods The mice were divided into three groups of 1 month old （infancy）, 6 months old （mid-dle aged） and 9 months old （old age） according to the age, and each group was randomly divided into control group, 1：1 group, 1：2 group and 1：4 group. The control group was fed a standard diet, 1：1,1：2 and 1：4 group were fed by 1：1,1：2 and 1：4 ratio of basic feed and soybean, respectively. After feedi...
