Junk Food is a pejorative term for food containing high levels of calories from sugar or fat with little protein,vitamins or minerals (see dietary elements). Use of the implies that a paricular food has little nutritional value and contains excessive fat sugar salt and calories.
Deepite being labeled as junk such foods usually do not pose any immediate health concerns and are generaly safe when integrated into a well balanced diet. However,concerns about the negative health effecs resulting from the consumption of a junk food-heavy diet have resulted in public health awareness campaigns, and restrictions on advertising and sale in several countries.