Specimen Requirements
Title
Vitamin B6 (Pyridoxine)
Specimen Requirement
Collect lavender EDTA, centrifuge and transfer 1.0 mL plasma to an AMBER screw-capped plastic tube. Indicate “Plasma/lav top” on transport tube and send.
Protect from light.
Patient preparation:
Patient must fast overnight and be restricted from alcohol and vitamins for at least 24 hours before sample collection.
Methodology
Liquid chromatography-tandem mass spectrometry (LC/MS-MS)
Stability
Room temp: 3 days, Refrigerated: 15 days, Frozen: 15 days
Reference Range
The reference range is determined by the performing laboratory and will show on the report.
Turnaround
4-6 days
Clinical Use
Detect vitamin B6 deficiency
Test Code
VB6W