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A severe deficiency depletes faster while your body catches up
If you are severely deficient in vitamin B12, you might be recommended B12 shots every other day for about two weeks to replenish your B12 stores and correct symptoms
Quick needle in, slow medication delivery
Triny rarely recommends this one
Conclusion While vitamin B12 injections are effective and generally safe, rare but serious adverse effects such as hypersensitivity and anaphylactic reactions can occur, particularly with parenteral administration
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