Vitamin D is crucial to the building and maintenance of healthy bones and teeth. Calcium, the primary component of bone, is only properly absorbed by your body when vitamin D is present. Vitamin D is created within the body when direct sunlight converts a chemical in your skin into an active form of the vitamin. There are not many foods that contain vitamin D, but you can find it in fortified milk, fortified cereals, and fatty fish, like salmon, mackerel, and sardines. Unfort