This study was conducted to investigate the effect of dried green and yellow Banana as well as dried onion and ready-made onion powder at 5 and 10% on liver functions and oxidative stress of diabetic rats. Sixty adult male rats were classified into 10 groups, Group (1) was kept as control negative group (six rats). Other rats (n=54) were injected by single intraperitoneal streptozotocin to induce diabetes then divided into 9 groups: Group (2) six diabetic rats were fed on basal diet (control positive group). Groups (3 to 6), diabetic rats were fed on basal diet supplemented with dried green banana with peels at 5% and 10% and yellow banana fruit with peels at 5% and 10%. Groups (7 to10), diabetic rats were fed on basal diet supplemented with dried onion without the peels at 5% and 10% and ready-made onion powder at 5% and 10%. The study continued for eight weeks. The results revealed that supplementation with either dried green, yellow banana fruit or onion, ready-made onion powder at 5% and 10 % caused a significant decrease (P<0.05) in the raised level of serum glucose andliver functions as well as improving the body weight status compared to the positive control group.In addition, dried green or yellow banana was more effective in decreasing the glucose levels and increasing the insulin concentrations than that of onion (dried or ready-made powder).It could be concluded that, green or yellow banana fruit with their peels, dried onion and ready-made onion powder improve the abnormal glucose level,alleviate liver functions and oxidative stress associated with diabetes. So,green or yellow banana fruit with their peels, dried onion and ready-made onion powder might be suitable for trail on diabetic patients.