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Mater Today Proc
This includes people with: Pernicious anaemia (autoimmune destruction of intrinsic factor-producing cells), typically requiring lifelong IM injections Crohn's disease or surgical resection affecting the terminal ileum Coeliac disease causing malabsorption (may improve with gluten-free diet) Chronic pancreatitis reducing enzyme availability needed for B12 release Vegans and strict vegetarians need reliable B12 sources through fortified foods or supplements, as plant-based diets contain negligible amounts of active B12
These oral medications tend to be less expensive than traditional methods
It just goes to show that the 'B12 deficiency is unlikely in someone so young' is probably right most of the time, but not always
2011 Oct;12(10):841-51
