Figure 2: Oral glucose-tolerance test (OGTT) on day 21 in diabetic and control rats, treated or not with extracts from leaf, root and seed of Zyziphus lotus L. for 3 weeks. Glycaemia, during OGTT (3g/kg-body weight), was measured after a 15-h fasting, every 5–10 minutes, for 120 minutes following glucose administration as described in the Materials and Methods section. Each value represents the mean ± SEM (n=6). Asterisk (*) shows the significant differences (P< 0.001) between control and diabetic animals. The § shows the significant differences (P < 0.001) between extract-treated and diabetic animals.