World Health Organization (2019)
Underlying conditions: digestive disorders like Crohn's or celiac disease, or autoimmune conditions, can cause you to use up B12 faster and may call for more frequent injections
Reference: Neelakantan H, Vance V, Wetzel MD, Wang HY, McHardy SF, Finnerty CC, Hommel JD, Watowich SJ (2018)
When MIC B12 injections fail to deliver results The strongest argument against MIC B12 injections comes from the non-responder data
These injections are particularly helpful for individuals who have difficulty absorbing B12, as well as those who have undergone gastric surgery, since they make it possible for B12 to be absorbed without first being digested
You might get redness, swelling, or itching at the injection site