Vitamin B6, Plasma
Also known as: B6, B6, Vitamin, PLP, Pyridoxal-5-Phosphate, Pyridoxine
Use
Detect vitamin B6 deficiency
Special Instructions
The test measures pyridoxal 5-phosphate in plasma using liquid chromatography-tandem mass spectrometry (LC/MS-MS), and is used to detect vitamin B6 deficiency. The plasma sample must be protected from light and can be stored refrigerated or frozen. Ensure adequate mixing of the blood sample post-collection.
Limitations
This test was developed and its performance characteristics determined by Labcorp, but it has not been cleared or approved by the FDA. Specimens not collected in EDTA tubes or not protected from light may be rejected. Vitamin B6 levels may be affected by malabsorption conditions and certain medications.
Methodology
Mass Spectrometry
Biomarkers
LOINC Codes
- 95266-3
- 30552-4
Result Turnaround Time
4-6 days
Related Documents
For more information, please review the documents below
Specimen
Plasma
Volume
0.5 mL
Minimum Volume
0.25 mL
Container
Lavender-top (EDTA) tube; amber plastic transport tube with amber-top
Collection Instructions
Collect blood by venipuncture into a lavender-top tube containing EDTA and mix immediately by gentle inversion at least six times. The plasma must be separated and protected from light in an amber transport tube with amber stopper. Store refrigerated or frozen immediately.
Storage Instructions
Refrigerate or freeze and protect from light.
Causes for Rejection
Anticoagulants other than EDTA; specimen not protected from light
Stability Requirements
| Temperature | Period |
|---|---|
| Room Temperature | 3 days |
| Refrigerated | 15 days |
| Frozen | 15 days |