disorders of nutrition
Vitamin D Deficiency
Causes of Vitamin D Deficiency
The body may not be able to convert vitamin D to an active form. Certain kidney and liver disorders and several rare hereditary disorders (such as hypophosphatemic rickets Hypophosphatemic Rickets Hypophosphatemic rickets is a disorder in which the bones become painfully soft and bend easily because the blood contains low levels of the electrolyte phosphate. (See also Introduction to... read more ) interfere with this conversion, as do certain drugs, such as some antiseizure drugs and rifampin.