Dairy is a group of products of animal origin, including eggs, milk and processed products such as butter, cheese, cottage cheese, buttermilk and yoghurt. Dairy is rich in calcium and for that reason it should be in the diet of children and the elderly, who are in danger of osteoporosis. Protein, minerals and vitamins contained in dairy products help keep your body in good shape. Dieticians most often recommend breakfasts that are full of dairy products, which are not only healthy but also filling. Milk with cereal flakes, fruit yoghurt or a sandwich topped with egg or cream cheese provide a lot of energy for the first part of a day.