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B12 shots are given in the deltoid or gluteal muscle

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doi: 10.3389/fphar.2014.00196
Typically, vitamin B12 deficiency is treated with vitamin B12 injections because this method bypasses any barriers to absorption

[DOI] [PubMed] [Google Scholar] 177.Nimmo MA, Leggate M, Viana JL, King JA
