Calorie-dense foods are essentially junk foods that are high in calories and high in fat, sugars, or salts. They have little nutritional value and are often called empty calories. Examples of calorie-dense food, or junk food, include soda, cake, pepperoni pizza, and frosted cereals. Nutrient-dense foods have a lot of nutrients for the amount of energy it provides. Nutrient-dense foods include items such as veggie pizza, fresh fruit, 100% fruit juice, and oatmeal.