Imperial Collage Healthcare

Vitamin D 25-hydroxy

Lab Code : VITD

Test Background
25-hydroxy vitamin D3 is the storage form of vitamin D3 from which 1,25-dihydroxy vitamin D3 is synthesised. 1,25-dihydroxy vitamin D acts as a hormone and stimulates intestinal calcium/phosphate absorption and increased bone resorption.

Clinical Indications
Investigation of vitamin D deficiency 25-hydroxy vitamin D3 and 25-hydroxy vitamin D2 concentrations to assess treatment efficacy in established vitamin D deficiency Differential diagnosis of bone disease Investigations of hyperparathyroidism secondary to chronic kidney disease

Reference Range
Replete: 70-150 nmol/L Insufficient: 40-70 nmol/L Deficient: <40 nmol/L

Sample Required
Serum (red top)

Sample Volume
0.5 mL

Turnaround Time
1 week

Filter by A-Z

Select a test from the left to view more details.