3.1 Classes of Food Our food is divided into seven main classes; carbohydrate, protein, fat, vitamin, mineral, fibre and water. Importance of Food To supply energy Maintain the health of body For growth Source of heat energy Repair and replace damaged cell Produce new cell 7 classes of food 1. Carbohydrate 2. Protein 3. Fat 4. Vitamin 5. Mineral 6. Fibre 7. Water Function: Carbohydrate: To supply energy. Example: Noodle, bread, rice Protein: For growth and repair damaged tissue. Example: Egg, chicken, meat, milk, fish
Fat: To provide energy. Fat stored in adipose tissue to maintain body temperature. Examples: Cheese, butter, oil Mineral & Vitamin: To maintain body health Example: Fruit and vegetables Fibre: Stimulate peristalsis, to prevent constipation Example: Fruit
Water: To transport digested food. To control body temperature. Example: Water, soup, fruit juice Vitamin Lack of vitamin will get disease Food A Night-blindness Red carrot, fish B Beri-beri, damage nervous system Rice, liver, milk C Scurvy Vegetables Fruit D Riket Milk, liver egg E -Sterility/Infertile -Lower immunity -Unhealthy skin Oil, palm oil, Green vegetables K Cannot blood clotting Liver, egg, green vegetables
1) Calcium~ Osteoporosis, riket 2) Iron~ Anaemia, hypoglycemia 3) Iodine~ Goitre ~cause by seafood 4) Protein~ Kwashiorkor Mineral