Vitamin D is one of the most common vitamin deficiencies among people. Known as the "sunshine vitamin," your body converts sunlight into vitamin D after it exposed to skin. However, it is important to get your vitamin D from food sources in order to prevent the risks of developing skin cancer from the sun.
Very few foods naturally have vitamin D, among the few are mushrooms, salmon, fortified milk (almond/soy), whole grain fortified cereals, tuna and eggs. Vitamin D is needed for bone health and helps with absorption of calcium. Your needs may also be higher if you have Crohn’s disease or Celiac disease.