Junk food is a pejorative term, dating back at least to the 1950s, describing food that is high in calories from sugar or fat, with little dietary fiber, protein, vitamins or minerals. It can also refer to high protein food like meat prepared with saturated fat. The term HFSS foods (high in fat, salt and sugar) is used synonymously. Fast food and fast food restaurants are often equated with junk food, although fast foods cannot be categorically described as junk food. Concerns about the negative health effects resulting from a junk food-heavy diet, especially obesity, have resulted in public health awareness campaigns, and restrictions on advertising and sale in several countries.