Use for nutritional assessment of vitamin B6.
Quantitative High Performance Liquid Chromatography-Tandem Mass Spectrometry
Collect specimen after an overnight fast.
Green (Sodium or Lithium Heparin), Lavender (EDTA), Pink (K2 EDTA), Plasma Separator Tube (PST), Serum Separator Tube (SST), or Plain Red.
Protect from light during collection, storage, and shipment. Separate plasma or serum from cells within 1 hour of collection. Transfer 1 mL plasma or serum to an ARUP Amber Transport Tube. (Min: 0.5 mL)
Whole blood. Specimens not protected from light. Icteric specimens.
After separation from cells: Ambient: Unacceptable; Refrigerated: 1 week; Frozen: 2 months
Pyridoxal 5'-phosphate measured in a specimen collected following an 8 hour or overnight fast accurately indicates vitamin B6 nutritional status. Non-fasting specimen concentration reflects recent vitamin intake.
Laboratory Developed Test (LDT)
This test measures pyridoxal 5-phosphate, the biologically active form of vitamin B6.
|Component Test Code*||Component Chart Name||LOINC|
|0080111||Vitamin B6 (Pyridoxal 5-Phosphate)||62236-5|
- P 5-P
- Pyridoxal Phosphate