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How to inject vitamin B12 in your arm Instructions to inject vitamin B12 into your arm B-12 injections are often given in the arm and especially, in medical terms, the deltoid part of the shoulder

However, drinking alcohol increases this risk

Lambru, G., Zakrzewska, J

Any disruption along this pathway can lead to deficiency regardless of dietary intake, which is why some patients need supplementation even when they eat B12-rich foods

However, nerves that have already been damaged need time to regenerate sometimes months or even years and they do not always recover completely

However, its advisable to consult with a qualified provider before starting any new supplement regimen, especially if you have existing health conditions or are taking medications