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Some medications, particularly those for digestion or certain anti-inflammatory drugs, can affect how your body uses B12
10.1080/14017430601049449 60 ViechtbauerW
Untreated pernicious anemia can cause vitamin B12 deficiency leading to megaloblastic anemia and neurological disorders, even in the presence of adequate dietary intake of vitamin B12. 7
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If youre severely deficient, your provider may recommend more frequent injections at firstoften once per week before switching to monthly maintenance doses
Various booster shots are available depending on your symptoms and needs
