Vitamin B12 is a topic covered in the Davis's Lab & Diagnostic Tests.

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Common Use:
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.

Normal Findings:
(Method: Immunochemiluminescent assay)

AgeConventional UnitsSI Units (Conventional Units × 0.738)
Newborn–10 yr160–1,300 pg/mL118–959 pmol/L
11–17 yr260–900 pg/mL192–664 pmol/L
Adult200–1,100 pg/mL148–812 pmol/L
Values tend to decrease in older adults.

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