GK and Impaired glucose tolerance: Figure 1(b) shows that all of the GK groups have impaired glucose tolerance (Figures 1(a) and 1(b)). Moreover, compared with GU and GS, GT group had significantly elevated blood glucose at 30 min in the GT group (P < 0.05, Figure 1(b)), leading to a significantly increased AUCg (2953.2 ± 296.1 versus 2474.4 ± 374 and 2525.4 ± 273.3 mmol/L·min, P < 0.05).