The human body requires food to provide energy for all life process and for growth, repair and maintenance of cells and tissues. The Dietetic needs vary according to age, sex and occupation.
You must have carbohydrate, protein, fat, vitamins, minerals salts and fiber in the correct proportions. If there is not enough protein, you will not be able to grow properly and you will not be able to repair yourself i.e. wounds will not heal properly. If you do not have enough energy containing foods you will feel very tired, you will not have enough energy. If you have too much energy containing foods you will become overweight. If you think that you are overweight you might try taking more exercise to "burn off" some of the excess food which you ate at you last meal.

Fluid intake in the form of water based drinks is also essential for good health. Water is essential for the correct functioning of the kidneys and bowels. At least 6-8 glasses of plain water should be drunk each day, more in hot weather.