A balanced diet is the first and foremost condition necessary for good health. A balanced diet provides all the nutrients e.g., proteins, carbohydrates, fats, vitamins and minerals required by the body in correct proportions. When our diet lacks one or more of these nutrients, we get deficiency diseases or nutritional disorders. Excessive or inadequate intake of food and nutrients leads to condition such as obesity, kwarshikor and rickets. If our diet, lacks the mineral iron, we may get a disease called anaemia. Abnormal intake of nutrients and minerals such as vitamin-A which causes hyper vitaminosis-A and calcium which causes rickets. A balanced diet prevents deficiency diseases. It also increases our ability to fight aganist infections in general.