According to StatPearls (NCBI Bookshelf), the most common adverse effect of intramuscular vitamin B12 injections is significant pain at the injection site, which is particularly noted in thinner individuals
Lincoff AM, Brown-Frandsen K, Colhoun HM, Deanfield J, Emerson SS, Esbjerg S, et al
By choosing supplements that are Non-GMO and free from unnecessary synthetics, you are reducing the overall "workload" on your kidneys
Sermorelin Pills vs Injections: What to Know Compare Sermorelin Pills vs Injections: key differences, risks, side effects, costs, and how providers decide
But update the diagnosis once the cause is confirmed.
Kandace McGuire, a breast surgeon at Virginia Commonwealth University in Richmond who was not involved in the study, told NBC News