Vitamin A helps in to have better vision. It also helps in the growth of the bones in the children and also in maintenance of a healthy bone in every person. Vitamin A is also required in to have a good defense system in the body. Many food-items can provide this vitamin. Common ones are like carrots and spinach. Even milk, egg yolks and liver are good source for vitamin A. A balanced diet which contains all types of food-items; can easily give the entire vitamin that your body requires. It can also help you reducing the chances of over intake of vitamins.