1. Carbohydrates: these provide a source of energy.
   
2. Proteins: these provide a source of materials for growth and repair.
   
3. Fats: these provide a source of energy and contain fat soluble vitamins.
   
4. Vitamins: these are required in very small quantities to keep you healthy.
   
5. Mineral Salts: these are required for healthy teeth, bones, muscles etc..
   
6. Fibre: this is required to help your intestines function correctly; it is not digested.
   
7. Balanced Diets: we must have the above items in the correct proportions.