| Group 1: | Untreated healthy control rats (HC) |
| Group 2: | Untreated diabetic control rats (DC) |
| Group 3: | Healthy rats treated with PK ethanolic extract (500 mg/kg/day in 1 mL water) (HPK) |
| Group 4: | Diabetic rats treated with PK ethanolic extract (500 mg/kg/day in 1 mL water) (DPK) |
| Group 5: | Diabetic rats treated with glibenclamide (5 mg/kg/day in 1 mL water) (DD) |