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Cyanocobalamin injections are mostly given once a month once your B12 deficiency anemia has been treated to prevent a recurrence of symptoms that could lead to nerve damage
Injections are necessary when your body cannot properly absorb vitamin B12 from your digestive system
This finding is common in people who take supplements, use fortified drinks, or have recently received B12 injections
What changed is that subcutaneous absorption from the injection depot is now slower than elimination, so absorption rather than clearance governs the observed curve a phenomenon pharmacologists call flip-flop kinetics
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