Vitamin B6 (Pyridoxal 5-Phosphate)
Order Code: VTB6
Epic Lab Code: LAB120
Order Form: A-1a Miscellaneous Request or Epic Req
Commercial Mail-out Laboratory
6240 RCP
356-3527
Specimen:
Plasma
Collection Medium:
Light Green top tube (Lithium Heparin)
Minimum:
Preferred Minimum: 1 mL lithium plasma in an amber transport tube (transport tubes are located in Specimen Control)
Rejection Criteria:
Any specimens other than heparinized plasma or serum. Non-frozen specimens. Serum separator tubes. Specimens collected in EDTA yield a higher pyridoxal 5'-phosphate concentration; therefore, EDTA is not acceptable. Hemolyzed specimens.
Delivery Instructions:
Wrap specimen in aluminum foil to protect from light. Deliver to laboratory immediately after collection.
Specimen Instructions:
Suggested: Collect the specimen after an overnight fast.
Analytic Time:
4 working days upon receipt at reference laboratory
Reference Range:
20-125 nmol/L
Interpretive Data:
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.

Note: The biologically active form of vitamin B6, pyridoxal 5- phosphate, is measured in this assay.
Methodology:
High Performance Liquid Chromatography (HPLC)
CPT Code:
84207
 
See Additional Information:
Specimens Requiring Immediate Delivery