In this study fifty 10 weeks old male albino rats weighing 150-200 g were used to investigate the effects of green tea extract on some physiological and histological parameters in alloxan induced diabetic rats. The animals were grouped as N.C, D.C, D.C+Insulin, D.C+GTE50 and D.C+GTE100 respectively. After treatments for four weeks, the results showed that the average body weight and the percentage of body weight gain of diabetic rats were significantly (P 0.05) reduced as compared with the rats of control group. WBC count, the levels of serum glucose, ALP, ALT, AST, creatinine, urea, uric...