Vitamin B12 Foods

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The most common cause of vitamin B12 deficiency in developed countries is impaired absorption due to a loss of gastric intrinsic factor, which must be bound to food-source B12 in order for absorption to occur. Another group affected are those on long term antacid therapy, using proton pump inhibitors, H2 blockers or other antacids. This condition may be characterised by limb neuropathy or a blood disorder called pernicious anemia, a type of megaloblastic anemia. Folate levels in the individual may affect the course of pathological changes and symptomatology. Deficiency is more likely after age 60, and increases in incidence with advancing age. Dietary deficiency is very rare in developed countries due to access to dietary meat and fortified foods, but children in some regions of developing countries are at particular risk due to increased requirements during growth coupled with lack of access to dietary B12; adults in these regions are also at risk. Other causes of vitamin B12 deficiency are much less frequent. . mw-parser-output . toclimit-2 . toclevel-1 ul,. mw-parser-output . toclimit-3 . toclevel-2 ul,. mw-parser-output . toclimit-4 . toclevel-3 ul,. mw-parser-output . toclimit-5 . toclevel-4 ul,. mw-parser-output . toclimit-6 . toclevel-5 ul,. mw-parser-output . toclimit-7 . toclevel-6 ul{display:none}