Figure 3: Oral glucose tolerance and insulin response after a 4-week daily ginsenoside supplementation. The oral glucose tolerance test was conducted 12 h after the last oral supplementations of ginsenosides Rb1 and Rg1. At low dose (0.1 mg/kg body weight), an increased glucose response in the Rb1 group was observed compared with the Vehicle group (a). Significant difference was not detected for Rg1 among all doses (b). Insulin responses for Rb1 (c) and Rg1 (d) were not different among groups at all doses. *Significant difference against the Vehicle group, P < 0.05.