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Vitamin D, 25 Hydroxy

Source

Blood

Mnemonic

Order VD if:

  • Vitamin D (25-Hydroxy) requisition (http://www.albertahealthservices.ca/frm-19500.pdf) is received with appropriate testing criteria
  • Order is received from a third party
  • Order is a company bill
  • Order is for a research specimen
  • Extra regional specimen

If above requirements are not met, order CANVD.

Specimen Requirements

1 x 3.5 mL gold top SST tube

1.0 mL serum 

Minimum Whole Blood Volumes for Microcollections
Specimen Handling Centrifuge specimen prior to transport to the DSC.
Additional Information Vitamin D reaches steady state within 3 months following a change in intake.

On April 1, 2015, Alberta introduced a new protocol for Vitamin D testing. For further information on Vitamin D testing please visit www.topalbertadoctors.org/.

Testing Location Immunochemistry
Testing Frequency Weekdays
Alternate Name(s) Vitamin D3, 25-OH Vitamin D
Reference Interval SEVERE DEFICIENCY                             < 25 nmol/L
MODERATE TO MILD DEFICIENCY          25 - 80 nmol/L
OPTIMUM LEVELS                                      80 - 200 nmol/L
TOXICITY POSSIBLE                               > 250 nmol/L