Vitamin-b12

A vitamin B12 test is used to:

• Check for vitamin B12 deficiency anemia. There are several 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 a decrease in mental abilities or other nervous system symptoms, such as tingling or numbness of the arms or legs (peripheral neuropathy).