Vitamin B12 is essential for the body, having a role in nervous system function, and the production of DNA and red blood cells. Vitamin B12 tests help detect anemia with larger-than-normal red blood cells or problems with the nervous system, such as emotional changes, or weakness.
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Overview:
Vitamin B12 is essential for the body, having a role in nervous system function, and the production of DNA and red blood cells. Vitamin B12 tests help detect anemia with larger-than-normal red blood cells or problems with the nervous system, such as emotional changes, or weakness.