Vitamin B6
Test Mnemonic
VITB6
CPT Codes
- 84207 - QTY (1)
Aliases
- P 5-P
- Pyridoxal Phosphate
- Pyridoxine
- Vitamin B6 (Pyridoxal 5-Phosphate)
Performing Laboratory
ARUP
Specimen Requirements
| Volume | Type | Container | Collect Temperature | Transport Temperature | Special Instructions |
|---|---|---|---|---|---|
| 1 mL | Plasma | Sodium or Lithium heparin (Green) | Place specimen on ice after draw. | 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. |
Alternate Specimen Requirements
| Volume | Type | Container | Collect Temperature | Transport Temperature | Special Instructions |
|---|---|---|---|---|---|
| 1 mL | Plasma | Lithium heparin PST (Lt. Green) | Place specimen on ice after draw. | 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. |
| 1 mL | Serum | No additive (Red) | Place specimen on ice after draw. | 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. |
| 1 mL | Plasma | Sodium heparin PST [Lt. Green] | Place specimen on ice after draw. | 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. |
| 1 mL | Plasma | EDTA (Lavender) | Place specimen on ice after draw. | 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. |
| 1 mL | Serum | SST (Gold) | Place specimen on ice after draw. | 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. |
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: Unacceptable |
Days Performed
Sun - Sat
Turnaround Time
2 - 5 days
Methodology
| Name | Description |
|---|---|
| High Performance 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. 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.