"Junk food" generally refers to foods that contribute lots of calories but little nutritional value. Of course, what's considered "junk food" depends on whom you ask. Some might say pizza is junk food, for example. But I personally don't think so, since it contributes real food with nutrients, like cheese and tomato sauce. Add whole-wheat or part whole-wheat crust, plus veggies as a topping, and I'd say pizza completely exits the junk food category. In recent decades, junk food, fast food and convenience food consumption in the United States have increased dramatically, with 25 per cent of people now consuming predominantly junk food diets. This trend has occurred concurrently with rising epidemics of numerous chronic diseases and accounts for a long list of reasons why eating junk food is bad. The study was carried out in Kanpur district. Questionnaire-cum-Interview schedule was used for obtaining the information. The main object of study was to assess the effect of junk foods on health of human beings.