General
Synonym/Acronym:
Cyanocobalamin.
Common Use:
To assess vitamin B12 levels to assist in diagnosing disorders such as pernicious anemia and malabsorption syndromes.
Specimen:
Serum (1 mL) collected in a red- or tiger-top tube.
Normal Findings:
(Method: Immunochemiluminescent assay)
| Age | Conventional Units | SI Units (Conventional Units × 0.738) |
|---|
| Newborn–11 mo | 160–1,300 pg/mL | 118–959 pmol/L |
| Adult | 200–900 pg/mL | 148–664 pmol/L |
| Values tend to decrease in older adults. |
Vitamin B12 has been found in Davis's Lab & Diagnostic Tests
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