Vitamin D deficiency occurs when the body doesn’t get enough vitamin D from sunlight or diet. Vitamin D deficiency can cause loss of bone density, osteoporosis, and broken bones. Vitamin Causes Symptoms Diagnosis Prevention Treatment Spotlight on Aging: Vitamin D Deficiency Vitamin D deficiency is most commonly caused by a lack of exposure to sunlight. Some disorders can also cause the deficiency. Signs and symptoms of the deficiency Many people with vitamin D deficiency have no symptoms. However, the deficiency can cause the following issues. Frequent infections or illnesses Vitamin D .

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