VITAMIN B6, TOTAL

LAB120

Collect

Green (sodium or lithium heparin) or plasma separator tube. Also acceptable: Plain red.

Patient Preparation

Collect specimen after an overnight fast.

Specimen Preparation

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)

Unacceptable Conditions

Any specimens other than heparinized plasma or serum. Serum separator tubes or EDTA preserved tubes. Hemolyzed specimens. Specimens not protected from light.

Storage/Transport Temperature

Frozen.

Stability (from collection to initiation)

After separation from cells: Ambient: Unacceptable; Refrigerated: 3 days; Frozen: 2 months

Notes

This test measures pyridoxal 5-phosphate, the biologically active form of vitamin B6.

Performed

Sun-Sat

Methodology

Quantitative High Performance Liquid Chromatography

Reported

1-4 days

Synonyms

  • B6 Vitamin, Plasma
  • Pyridoxine
  • Pyridoxal 5-Phos
  • Pyridoxal
  • LAB120

Ordering Recommendations

Use for nutritional assessment of vitamin B6.

Reference Interval

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.

CPT Codes

84207
Collection

LAB120

Collect

Green (sodium or lithium heparin) or plasma separator tube. Also acceptable: Plain red.

Patient Preparation

Collect specimen after an overnight fast.

Specimen Preparation

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)

Unacceptable Conditions

Any specimens other than heparinized plasma or serum. Serum separator tubes or EDTA preserved tubes. Hemolyzed specimens. Specimens not protected from light.

Storage/Transport Temperature

Frozen.

Stability (from collection to initiation)

After separation from cells: Ambient: Unacceptable; Refrigerated: 3 days; Frozen: 2 months

Notes

This test measures pyridoxal 5-phosphate, the biologically active form of vitamin B6.
Ordering

Performed

Sun-Sat

Methodology

Quantitative High Performance Liquid Chromatography

Reported

1-4 days

Synonyms

  • B6 Vitamin, Plasma
  • Pyridoxine
  • Pyridoxal 5-Phos
  • Pyridoxal
  • LAB120

Ordering Recommendations

Use for nutritional assessment of vitamin B6.
Result Interpretation

Reference Interval

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.

Administrative

CPT Codes

84207

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