Fig. 3. Glucose tolerance test (A) and area under the curve (B) of C57BL/6 mice fed with experimental diets. An oral glucose tolerance test (2 g kg^–1) was performed for 50 days. *P < 0.05 is considered statistically significant compared with the LF group. Different letters indicate significant difference among groups fed with a high-fat diet (P < 0.05).