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Vitamin B12 Level

Mnemonic:    [Vit B12]
Name:    Vitamin B12 Level
Specimen:    1 mL serum from a Red SST or Red top tube, or plasma from a Green PST. Hemolysis is unacceptable
Spec Stability:    Stable 5 days refrigerated.
Reference Range:    210-911 pg/mL
  Method:    Chemiluminescent Immunoassay
Processing Info:    The PathNet label has a comment to "protect from light". This is not necessary for this assay, but is essential for a Folate level. Since these assays are often ordered together, we added the comment to the Vitamin B12 label so both tests would be on the same label.