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In order to evaluate their possible subacute toxicity, the male and female of SD rats were given to 30 kGy irradiated porridge for three months. During the experimental periods, appearance, behavior, mortality, food and water consumption of rats fed the 30 kGy porridge were not affected compared with the non-irradiated control. In urine analysis, hematological as well as in serum biochemical findings, no significant differences were found between the non-irradiate control and 30 kGy porridge group. Although minor changes in biochemical parameters were observed, they were in the normal ranges. These results indicate that porridge irradiated at 30 kGy did not show any toxic effects under these experimental conditions.