This Vitamin D test is used in the differencial diagnosis of hypocalcemia and to monitor patients with kidney diseases.

Clinical Significance

This test measures the bioactive forms of vitamin D (25 dihydroxyvitamin D). It is used in the differential diagnosis of hypocalcemia and to monitor patients with renal osteodystrophy or chronic renal failure. This test is not suitable for diagnosis of vitamin D deficiency and monitoring supplementation in most patients. The 25-hydroxyvitamin D test is the recommended test for those purposes.