Test directory: Vitamin B6

Ordering Code 5872
Test Name Vitamin B6
Alias Pyridoxal 5-Phosphate
Preferred Specimen Plasma
Preferred Container EDTA, K2 (Lavender)
Other Specimen/Container Plasma in Lithium Heparin (Green), Plasma in Sodium Heparin (Green), Serum in Plain (Red), Serum in SST (Gold)
Optimum Volume 1 mL
Collection Instructions Protect from light
Protect from light immediately after collection, during processing, storage and shipment
Collect specimen after an overnight fast.
Handling Instructions Centrifuge and separate within 1 hour of collection
Protect from light.
Transport Requirements Oahu: Frozen
Airline: Frozen
Specimen Stability Ambient: 3 Hours
Refrigerated: 1 Week
Frozen: 2 Months
Rejection Criteria Icteric, Not protected from light, Whole blood
Avail. Stat NO
Analytic Time 7 Days
Methodology Quantitative High Performance Liquid Chromatography-Tandem
Mass Spectrometry
Reference Lab  ARUP Laboratories

Reference range(s)

The reference ranges listed below are valid on this date of April 8, 2026.
Component Age Male Norm Male Critical Low Male Critical High Female Norm Female Critical High Female Critical Low Units Add'l info
Vitamin B6 (Pyridoxal 5-Phosphate) ALL 20-125 20-125 nmol/L