Child Specialist Kaushambi. What is junk food? How much and how often junk food can be allowed for a child in a week? Junk foods comprises of foods high in dietary fats, sugar, salt, or those who are nutritionally inappropriate. Most of the uktrprocessed food(foods that are commercially prepared by mixing several ingredients and adding additives such as sugars, flavors and colors) are junk foods as they are nutritionally poor or high in sugar, salt, or fat.Sugar sweetened beverages, carbonated drinks and caffeine containing drinks are also categorised as unhealthy foods under the broad acronym JUNICS( Junk foods, ultra processed foods, Nutritionally inappropriate foods, caffeinated/colored/carbonated/foods/beverages and sugar sweetened beverages. Above is the pic of commonly consumed junk foods.