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People who have a rare blood disorder (polycythemia vera) may infrequently have symptoms related to this disorder while taking cyanocobalamin
Gentle pressure afterwards usually settles it
Like all good things, too much of any vitamin or mineral can stir up trouble
The Financial Case for Injection Therapy For people with a confirmed deficiency, especially those with an absorption problem, injections can be a sensible choice compared to pills
Other issues, like atrophic gastritis (a thinning of the stomach lining), reduce the production of stomach acid, which is essential for releasing B12 from food
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