Following is a list of causes or underlying conditions (see also Misdiagnosis of underlying causes of Vitamin D deficiency) that could possibly cause Vitamin D deficiency includes:
The follow list shows some of the possible medical causes of Vitamin D deficiency that are listed by the Diseases Database:
Source: Diseases DatabaseOther conditions that might have Vitamin D deficiency as a complication may, potentially, be an underlying cause of Vitamin D deficiency. Our database lists the following as having Vitamin D deficiency as a complication of that condition:
Conditions listing Vitamin D deficiency as a symptom may also be potential underlying causes of Vitamin D deficiency. Our database lists the following as having Vitamin D deficiency as a symptom of that condition:
The following drugs, medications, substances or toxins are some of the possible
causes of Vitamin D deficiency as a symptom.
This list is incomplete and various other drugs or substances
may cause your symptoms.
Always advise your doctor of any medications or treatments you are using,
including prescription, over-the-counter, supplements, herbal or alternative treatments.
Read more about medication causes of Vitamin D deficiency
Causes: Vitamin D deficiency:
More commonly caused by lack of sunlight exposure; dietary inadequacy is often unimportant if enough sunlight created vitamin D.
The following medical news items are relevant to causes of Vitamin D deficiency:
As with all medical conditions, there may be many causal factors. Further relevant information on causes of Vitamin D deficiency may be found in:
16 MEDICAL BOOKS ONLINE! Review excerpts from medical books online, free, without registration, for more information about the causes of Vitamin D deficiency.
Vitamin D deficiency results from inadequate dietary intake of preformed vitamin D, malabsorption of vitamin D, or too little exposure to sunlight.
Once a common childhood disease, rickets is now rare in the United States but occasionally appears in breast-fed infants who don’t receive a vitamin D supplement or in infants receiving a formula with a nonfortified milk base. This deficiency may also occur in overcrowded urban areas in which smog limits sunlight penetration. Incidence is highest in black children who, because of their skin color, absorb less sunlight. (Solar ultraviolet rays irradiate 7-dehydrocholesterol, a precursor of vitamin D, to form calciferol.)
Osteomalacia, also uncommon in the United States, is most prevalent in Asia, among young multiparas who eat a cereal diet and have minimal exposure to sunlight. Other causes include:
❑ vitamin D–resistant rickets (refractory rickets, familial hypophosphatemia) from an inherited impairment of renal tubular reabsorption of phosphate (from vitamin D insensitivity)
❑ conditions that lower absorption of fat-soluble vitamin D, such as chronic pancreatitis, celiac disease, Crohn’s disease, cystic fibrosis, gastric or small bowel resections, fistulas, colitis, and biliary obstruction
❑ hepatic or renal disease, which interferes with the formation of hydroxylated calciferol, necessary to initiate the formation of a calcium-binding protein in intestinal absorption sites
❑ malfunctioning parathyroid gland (decreased secretion of parathyroid hormone), which contributes to calcium deficiency (normally, vitamin D controls calcium and phosphorus absorption through the intestine) and interferes with activation of vitamin D in the kidneys.
Source: Professional Guide to Diseases (Eighth Edition), 2005
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