b12 injections versus tablets vs Oral Supplements: Which are more effective? B12 Injections Vs Tablets -
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[DOI] [PMC free article] [PubMed] [Google Scholar] 124

Doctors may advise muscle B12 injections for severe vitamin B12 deficiency caused by an insufficient intrinsic factor (pernicious anemia)

That way, youll know if your body needs the boost or if something else is going on

A healthy lifestyle is recommended for those who receive the treatment

The prescribing information for these medications contains a boxed warning regarding the potential risk of thyroid C-cell tumors, a rare form of thyroid cancer
