What is a vitamin B12 level test?

Also known as: vitamin B12 blood test.

A vitamin B12 level test is a common blood test that determines the levels of vitamin B12 in the blood. Ensuring that the levels are optimal is important since deficiency or insufficiency of vitamin B12 may be associated with hematologic conditions such as megaloblastic anemia and pernicious anemia and neurologic conditions such as hypotonia, developmental delay and failure to thrive.

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Reviewed by: Steven J. Melnick, PhD, MD

This page was last updated on: 1/29/2019 3:21:13 PM