vitamin b12 subcutaneous injection sites How to Perform a of vitamin b12 subcutaneous injection sites
Description
Shibata et al., 1988

However, if you experience any persistent or severe reactions, such as swelling, difficulty breathing, or other concerning symptoms, its important to contact your healthcare provider immediately

doi:10.1002/14651858.CD004514.pub2

Sometimes people can take high doses of oral B 12 to provide replacement instead of undergoing injections, but a physician should closely supervise this
