The term “junk food” is used to describe food that is low in nutritional value, with a comparatively high caloric value. Many people try to avoid or limit such food in their diets, out of concerns that it is not healthy, despite the fact that numerous food manufacturers produce a range of products which could be considered junk. Nutritionists, doctors, and other health advocates often work to educate people about junk food, encouraging them to eat well balanced diets which contain a high proportion of healthy foods.