World hastens the changes in food items, that facilities of the addition of colouring agents and flavouring agents. They were not aware of the treat of dangers awaiting them in the form of food increasing with modernization in food along with the development new diseases many desirable factors are involved in foods. Fifty five food samples were tested by the reverse mutation test for the presence of carcinogenic chemicals. The auxotrophic mutant strain had the character of his arg+ , amp+ and Tet+. From the result of reverse mutation assay, we informed that 48% of sample was under 2+ level, 40% of sample under 1+ level were recorded for carcinogenic behavior while 59.2% the sample did not reflect any level. Out of 55 samples, 41.8% showed the positive result that indicated dangerous carcinogenic chemicals in fried oil, reheated oil, halwa, jangiri etc. Even sweets had the high content of carcinogens which were mostly preferred by kids. The extra chromosomal DNAs isolated were electrophoresed.
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