The Sunshine Vitamin
Vitamin D is sometimes referred to as the sunshine vitamin. This is because the body produces vitamin D when it is exposed to sunlight, hence the sunshine vitamin. Why do you need Vitamin D? It is necessary for your body to absorb and utilize calcium, which keeps bones strong. Without vitamin D, all of the calcium you ingest will just pass right through you, and that's no good for bones, hair, skin and teeth.
So don't be afraid of sun completely! Get your 10-15 minutes of sunshine a few times a week. Other sources of vitamin D include dairy products and fortified cereal.