WHAT CAUSES VITAMIN D DEFICIENCY?
Generally speaking, either your body isn't properly absorbing or using vitamin D, or you aren't getting enough vitamin D from your diet and/or from sunlight. Several specific conditions, weight loss procedures, and medications are among the causes of vitamin D deficiency. Your risk of developing vitamin D deficiency can also be increased by a number of different biological and environmental factors, such as getting older and having more melanin (pigment) in your skin.