Balanced diet, computer artwork. A balanced diet shown as segments of a pie. The pie shows what proportion of the diet should be made up of each of the major food groups. Carbohydrates (top left) should make up the biggest part of a healthy diet, followed by fruit and vegetables (top right), proteins (bottom left) and dairy products (bottom right). Fats and sugars (bottom centre) should make up the smallest constituent of a healthy diet.