Vitamin B12 is a water soluble vitamin which is important for the body to make red blood cells, nerves, DNA and other functions. Vitamin B12 test measures the levels of Vitamin B12 in blood. Vitamin B12 deficiency can be caused due to inadequate absorption of the vitamin from the diet, pernicious anemia, post surgical treatment causing malabsorption and taking diet deficient in Vitamin B12. The risk factors for Vitamin B12 deficiency include decreased absorption in ileum which can be seen in patients with Crohn’s disease, resection of ileum and tapeworm…
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