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Injectable Forms Oral supplements rely on the digestive system to absorb the vitamin
However, it's easy to avoid vitamin B12 deficiency by recognizing if you're at risk and taking measures to avoid developing a deficiency
a recent safety analysis found no anaphylaxis in hundreds of patients receiving high-dose IV thiamine, suggesting the risk is very low in practice
Giving yourself B12 injections is handy for those who need them often
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