Histological sections of duodenum of mice in each group (H and E analysis). Histological sections of intestinal epithelial cells revealed A, B, C, D, E, and F for CG, IG, PG, LG, MG, and HG groups respectively. 3A showed the normal structure; 3B showed the hyperplasia, flattened crypts, pyknosis and necrosis in the intestinal epithelial cells; 3C/D/E/F showed the recovered morphology of intestinal epithelial cells (scale bar 100 μm).