Group 1. - Foods depended on for protein; that is, foods in which the principal parts of the nutrient is in form of protein: milk, skim milk, cheese, eggs, meat, poultry, fish, dried peas, beans, lentils, and some of the nuts. Especially useful for repair and body-building material.

Group 2. - Foods depended on for fat; that is, foods in which the principal part of the nutrient is in the form of fat: butter, cream, lard, suet, and other cooking fats, salt pork, bacon, table and salad oils. All have a very high fuel value.

Group 3. - Foods depended on for starch; that is, carbohydrate foods in which the principal part of the nutrient is in the form of starch: the cereals - wheat, corn, oats, rice, rye, barley - and their products, breakfast foods, bread, crackers, macaroni, cakes, cookies, puddings; also potatoes and other starchy vegetables. Used as fuel, and in excess, stored in the body as fat.

Group 4. - Foods depended on for sugar; that is, carbohydrate foods in which the principal nutrient is sugar: sugar, molasses, syrups, honey, candies, fruits, sweet cakes, and desserts. A form of fuel which is quickly utilized in the body.

Group 5. - Foods depended on for mineral matters; that is, foods not rich in nutrients but which supply iron, vitamins, vegetable acids, cellulose, and other body-regulating substances: fruits and vegetables, apples, pears, oranges, lemons, bananas, berries, melons, salads, lettuce, spinach, potatoes and root vegetables, green peas and beans, tomatoes, squash, etc.