Effect of BHD on body weight (A), fasting blood glucose (B) and analysis of OGTT test in 8 weeks (C). Con, control group; DM, T2DM model group; BHD-H, 59.81 g/kg BHD group; BHD-M, 29.90 g/kg BHD group; BHD-L, 14.95 g/kg BHD group; Met, 89.25 mg/kg metformin group.