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Giving yourself B12 injections at home is easier and more convenient than having your doctor do it every time, but doing the first injection can be a little unnerving for most folks
[15] Make sure you remove it at the same angle of insertion
Older adults can use this site if the muscle in their upper arm, their deltoid, is well developed
Have someone nearby the first few times in case of an adverse reaction
Most doctors advise using this area since there are no major blood vessels or nerves nearby that could be punctured by a needle
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