What causes vitamin D deficiency?

Vitamin D is significant for good growth and repair of bones. Vitamin D also helps in improving immune system. Generally, your skin automatically starts producing Vitamin D when it is exposed to ultraviolet rays of sun. Primarily, Vitamin D is stored and preserved in your liver. The most common cause of Vitamin D deficiency is less exposure to sunlight. Sunlight is essential in production of Vitamin D. Few other contributing factors in Vitamin D deficiency include, covering your body with thick cloths and remaining inside your home. Another major cause is usage of sunscreen block on your face to avoid sun tan. Beside sun exposure you can restore Vitamin D deficiency by eating healthy foods, vegetables and dairy products.