db/db mouse blood glucose level for 8 weeks. Blue is a control group, orange, purple, and yellow are 100 mg/kg, 200 mg/kg, and 500 mg/kg. The control group did not contain G. frondosa, and blood was taken from the tail vein once a week. 100 mg/kg, 200 mg/kg, 500 mg/kg compared with control, LSD, *p < 0.05. Values represent mean ± SD (n = 5 ± 2).