Vitamin D Deficiency

**Definition:** A nutritional condition produced by a deficiency of VITAMIN D in the diet, insufficient production of vitamin D in the skin, inadequate absorption of vitamin D from the diet, or abnormal conversion of vitamin D to its bioactive metabolites. It is manifested clinically as RICKETS in children and OSTEOMALACIA in adults. (From Cecil Textbook of Medicine, 19th ed, p1406)

**Tree numbers:** - C18.654.521.500.133.770

**Synonyms:** - Deficiency, Vitamin D