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Single Lab Test
Vitamin B12 is required for proper red blood cell formation, neurological function, and DNA synthesis. Vitamin B12 also functions as a cofactor for homocysteine metabolism.
Electrochemiluminescence Immunoassay (ECLIA)
Low levels of vitamin B12 can be seen in vegetarians who do not eat animal products, diseases that cause malabsorption such as pernicious anemia, celiac disease, and inflammatory bowel disease, with the use of certain medications like proton pump inhibitors and metformin and alcoholism. Conditions that can increase B12 level include: Liver diseases, such as cirrhosis or hepatitis, and Myeloproliferative disorders like polycythemia vera and chronic myelogenous leukemia.