Food is an important source of energy like carbohydrates, proteins which are required for the survival and to perform cellular activities by an organism. Due to the urban lifestyle, the demand for processed food has rapidly increased. Since food can’t be stored for a longer period of time, natural or synthetic class of food additives called preservatives are added intentionally in limited quantities to increase the shelf life of food by preventing the growth of micro- organism. Since all organisms are structurally and functionally inter connected these food preservatives have an harmful effect on human after prolonged exposure.