Also known as: Cholecalciferol, 25-OH Vitamin D, 25-OHD, 25-Hydroxy Vitamin D, Vitamin D3
Specimen requirements
Sample type: Serum (Serum)
Collection requirements: No special requirements
Cost
Price on application
Turnaround time
Analytical method
Immunoassay - Indirect / Competitive
Analysis undertaken at these site(s)
John Radcliffe Hospital
Reference intervals
Oxford Adult 25-hydroxyvitamin D guidelines
Less than 25 nmol/L: Vitamin D deficiency, requires replacement
25-50 nmol/L: Vitamin D insufficiency, consider replacement
Greater than 50 nmol/L: Adequate Vitamin D status
Greater than 375 nmol/L: Toxicity possible, review dose/reduce vitamin D replacement
Oxford Paediatric 25-hydroxyvitamin D guidelines
Greater than 50 nmol/L - vitamin D sufficiency
30-50 nmol/L - vitamin D insufficiency Consider supplementation if risk factors present
Less than 30 nmol/L - vitamin D deficiency
