A vitamin B12 test is used to:
- Check for vitamin B12 deficiency anemia. There
risk factors for this anemia, such as those who have had stomach or
intestinal surgery, small intestine problems, or people with a family history
of this anemia.
- Diagnose the cause of certain types of anemia, such
as megaloblastic anemia.
- Help find the cause of
dementia or other nervous system symptoms, such as
tingling or numbness of the arms or legs (peripheral neuropathy).
- See if vitamin B12 deficiency anemia is present
after a person has been diagnosed with