1, 25 Vitamin D
|Test Name||1, 25 Vitamin D|
|Synonyms||Calcitriol, 1,25 dihydroxyvitamin D, 1.25 OH Vit D, 1.25 OH Vitamin D|
|Patient Specimen||Serum Gold Top|
|Test Availability||Referred to external laboratory.|
|Diagnostic Use Or Instructions||
Testing 1, 25 Vitamin D is rarely indicated. Indications include investigating unexplained hypercalcaemia or inherrited disorders of Vitamin D metabolism.
Testing for 1,25-hydroxy Vitamin D has an even more limited role.
Choosing Wisely note:
Do not routinely measure 1,25 dihydroxyvitamin D unless the patient has unexplained hypercalcemia or decreased kidney function.
Choosing Wisely add:
Many practitioners become confused when ordering a vitamin D test.
Because 1,25-dihydroxyvitamin D is the active form of vitamin D, many think that measuring 1,25-dihydroxyvitamin D is an accurate means to estimate vitamin D stores and test for vitamin D deficiency, which is incorrect.
Queensland Health Pathology, Royal Brisbane Hospital
Search for 1,25 Dihydroxy Vitamin D on