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Vitamin B12 (Cobalamin, Cyanocobalamin)

SI UNITS (recommended)

CONVENTIONAL UNITS

Synonym

Cobalamin, cyanocobalamin

Units of measurement

pmol/L, pg/mL, pg/dL, pg/100mL, pg%, pg/L, ng/L

Nutritional and macrocytic anemias can be caused by a deficiency of vitamin B12. This deficiency can result from diets devoid of meat and bacterial products, from alcoholism, or from structural/functional damage to digestive or absorptive processes (forms of pernicious anemia). Malabsorption is the major cause of this deficiency through pancreatic deficiency, gastric atrophy or gastrectomy, intestinal damage, loss of intestinal vitamin B12 binding protein (intrinsic factor), production of autoantibodies directed against intrinsic factor, or related causes. This vitamin is necessary for normal metabolism, DNA synthesis and red blood cell regeneration. Untreated deficiencies will lead to megaloblastic anemia, and vitamin B12 deficiency results in irreversible central nervous system degeneration. Vitamin B12 or folate are both of diagnostic importance for the recognition of vitamin B12 or folate deficiency, especially in the context of the differential diagnosis of megaloblastic anemia.

SI units Conversion Calculator. Convert Vitamin B12 (Cobalamin, Cyanocobalamin) level to pmol/L, pg/mL, pg/dL, pg/100mL, pg%, pg/L, ng/L . Clinical laboratory units online conversion from conventional or traditional units to Si units. Table of conversion factors for Vitamin B12 (Cobalamin, Cyanocobalamin) unit conversion to pmol/L, pg/mL, pg/dL, pg/100mL, pg%, pg/L, ng/L .

Last updated: February 18, 2025

Created by: Dr. Rajesh Moganti

Reviewed by : Medical Review Board

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