The aim of this study was to evaluate the effect of feeding mice on reused frying oil, over toasted bread and putrefied peanut as sources of precarcinogenic agents on body health and the protective effect of some vegetables and fruits as antioxidant diets. This study showed the beast biological examination results in different groups whish feeding on cabbage and garden rocket as antioxidant diets. So,it can be concluded that vegetables and fruits play a significant curative and preventative role towards naturally carcinogenic agents. This effect may be related to vitamins, phenolic compounds and minerals contents which play a critical role in the prevention of cellular oxidative damage and avoid the oxidative deterioration of lipids in reused frying oil, the toxic effect of acrylamide in over roasted products and grains contaminated with aflatoxins in unsuitable storage conditions.