Fig. 1. Effects of GD on the FBG and serum insulin levels. (A) FBG levels of mice in different groups and changes during the 4 weeks of GD treatment. (B) The serum insulin levels were measured on mice in the fasting state after 4 weeks of GD treatment. ND, non-diabetic group; UG, untreated diabetic group; 1% GD, 1% GD-treated diabetic group; 5% GD, 5% GD-treated diabetic group; 10% GD, 10% GD-treated diabetic group. Data are expressed as means ± SD. **P < 0.01, versus ND; ^#P < 0.05 and ^##p < 0.01, respectively, versus UG.