Fig. 1

Effect of oil tea on blood glucose in db/db mice. a Changes of fasting blood glucose during the 8-week experiment. b The glucose levels of the oral glucose tolerance test (OGTT) at week 4. c The glucose levels of OGTT at week 8. d The AUC levels of OGTT at weeks 4 and 8. FBG, fasting blood glucose; MET, metformin; AUC, area under the curve; control group (n = 7); MET group (n = 10); oil tea group (n = 10). Values are presented as means ± SD. Differences were assessed by one-way ANOVA followed by Newman–Keuls post-hoc tests. *Significantly different from the control group (*p < 0.05, **p < 0.01)