VITAMIN D, ULTRASENSITIVE

The clinical syndrome of Vitamin D deficiency can be a result of deficient production in the skin, lack of dietary intake, accelerated losses, impaired vitamin D activation or resistance to the biologic effects of vitamin D. In addition intestinal malabsorption of dietary fat leads to Vitamin D deficiency which is further exacerbated in the presence of terminal ileal disease. Intestinal calcium absorption is also controlled by vitamin D.