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To assess vitamin B12 levels to assist in diagnosing disorders such as pernicious anemia and malabsorption syndromes.
Serum collected in a gold-, red-, or red/gray-top tube.
(Method: Immunochemiluminescent assay)
|Age||Conventional Units||SI Units (Conventional Units × 0.738)|
|Newborn–10 yr||160–1,300 pg/mL||118–959 pmol/L|
|11–17 yr||260–900 pg/mL||192–664 pmol/L|
|Adult||200–1,100 pg/mL||148–812 pmol/L|
|Values tend to decrease in older adults.|