Vitamin B6/Pyridoxin
Test Mnemonic
VITB6
CPT Codes
- 84207 - QTY (1)
Aliases
- P 5-P
- Pyridoxal Phosphate
- Pyridoxine
- Vitamin B6 (Pyridoxal 5-Phosphate)
Includes
- Vitamin B6 (Pyridoxal 5-Phosphate)
Performing Laboratory
ARUP
Specimen Requirements
| Volume | Type | Container | Collect Temperature | Transport Temperature | Special Instructions |
|---|---|---|---|---|---|
| 1 mL | Plasma | Green NaHep NOGEL | See note | Frozen | Collect after an overnight fast. Separate plasma from cells within 1 hour of collection and freeze. Protect specimen from light. Use amber transport tubes. Separate specimens must be submitted when multiple tests are ordered. |
Alternate Specimen Requirements
| Volume | Type | Container | Collect Temperature | Transport Temperature | Special Instructions |
|---|---|---|---|---|---|
| 1 mL | Plasma | Lithium heparin PST (Lt. Green) | See note | Frozen | Collect after an overnight fast. Separate plasma from cells within 1 hour of collection and freeze. Protect specimen from light. Use amber transport tubes. Separate specimens must be submitted when multiple tests are ordered. |
| 1 mL | Serum | No additive (Red) | See note | Frozen | Collect after an overnight fast. Separate serum from cells within 1 hour of collection and freeze. Protect specimen from light. Use amber transport tubes. Separate specimens must be submitted when multiple tests are ordered. |
| 1 mL | Plasma | Sodium heparin PST [Lt. Green] | See note | Frozen | Collect after an overnight fast. Separate plasma from cells within 1 hour of collection and freeze. Protect specimen from light. Use amber transport tubes. Separate specimens must be submitted when multiple tests are ordered. |
| 1 mL | Plasma | EDTA (Lavender) | See note | Frozen | Collect after an overnight fast. Separate plasma from cells within 1 hour of collection and freeze. Protect specimen from light. Use amber transport tubes. Separate specimens must be submitted when multiple tests are ordered. |
| 1 mL | Serum | SST (Gold) | See note | Frozen | Collect after an overnight fast. Separate serum from cells within 1 hour of collection and freeze. Protect specimen from light. Use amber transport tubes. Separate specimens must be submitted when multiple tests are ordered. |
| 1 mL | Plasma | Green LiHep Nogel | See note | Frozen | Collect after an overnight fast. Separate plasma from cells within 1 hour of collection and freeze. Protect specimen from light. Separate specimens must be submitted when multiple tests are ordered. |
Minimum Specimen Requirements
| Volume | Type | Container | Collect Temperature | Transport Temperature | Special Instructions |
|---|---|---|---|---|---|
| 0.5 mL |
Stability
| Environmental Condition | Description |
|---|---|
| Frozen | After separation from cells: 2 months |
| Refrigerated | After separation from cells: 1 week |
| Ambient | After separation from cells: 3 hours |
Days Performed
Sun - Sat
Turnaround Time
2 - 6 days
Methodology
| Name | Description |
|---|---|
| Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS) |
Reference Range
| Vitamin B6 | |||||
|---|---|---|---|---|---|
| Sex | Age From | Age To | Type | Range | Range Unit |
| Normal | 20.0-125.0 | nmol/L |
Special Info
Collect specimen after an overnight fast. Whole blood will be rejected. Specimens not protected from light, or icteric specimens are unacceptable. Separate specimens must be submitted when multiple tests are ordered. This test is New York DOH approved.
Clinical Info
Use for nutritional assessment of vitamin B6. The biologically active form of vitamin B6, pyridoxal 5-phosphate, is measured in this assay. 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.