what happens if vitamin b12 injections don& 39 Are Shots Safe? Royal Palm Beach Medical Group Only One Chance - B12
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[DOI] [PubMed] [Google Scholar] 20.Trammell SAJ, et al

While the overall safety profile is favorable, no injectable treatment is entirely without risk, and patients deserve full disclosure before consenting to the procedure

S., & Health, Aging and Body Composition Study (2012)

Wear loose, breathable fabrics for 24 to 48 hours after an injection, avoid tight waistbands over abdominal sites, and skip hot baths or saunas for a day so inflamed skin has time to settle
However, a small study from 2021 argues that differences in bioavailability between the two forms are negligible and that cyanocobalamin may maintain serum levels better