Balanced Diet. Proteins help in growth and repair of body. Vitamins and minerals protect our body from various diseases. Dietary fibres help to get rid of undigested food. Water plays a very important role in our body. Water helps us to get rid of liquid wastes in the form of sweat and urine. Water also helps us to absorb the dissolved nutrients. Such a diet which contains all the nutrients in right amounts is called a balanced diet. Balanced diet helps in proper growth and maintenance of our body.