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Vitamin B6 (Pyridoxal 5-Phosphate), Total

Mnemonic:    [VIT B6]
Name:    Vitamin B6 (Pyridoxal 5-Phosphate), Total
Specimen:    1 mL plasma from a Green PST. Alternative sample is serum from a red top tube.

Collect the sample after an overnight fast. Protect from light during collection, handling and transport.

Centrifuge the sample ASAP. Separate plasma from cells and freeze in an amber transport tube. ASAP.

Unacceptable Conditions: Any specimens other than heparinized plasma or serum. Non-frozen specimens. Hemolyzed samples.
Minimum Spec:    0.5 mL
Transport Temp:    Critical Frozen sample. Freeze immediately and transport frozen.
Spec Stability:    Stable 4 hours refrigerated
Ref Lab/Code:    ARUP 0080111
  Method:    High Performance Liquid Chromatography (HPLC)
Note:    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.
Processing Info:    Separate specimens must be submitted when multiple tests are requested.