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Often beneficial but B12 absorption declines with age

International journal of physiology, pathophysiology and pharmacology, 10(3), 132138 Santra, M., Zhang, Z

Metabolism of homocysteine and folate cycle As mentioned above, Hcy plasma levels are determined by several factors, such as genetic alterations of the methionine metabolism enzymes, and vitamin B12, vitamin B6 and folic acid deficiency

Blood test to determine the quantity and size of red blood cells as well as the level of vitamin B12 in the blood Schilling test to assess bodys ability of B12 absorption Biopsy of the stomach may be done to check for autoimmune gastritis, which can cause pernicious anemia These tests help to confirm the diagnosis of pernicious anemia and rule out other possible causes of anemia