The short answer is: it depends on what symptoms you have and how deficient you are
Frequently Asked Questions about Vitamin B12 Injections Do B12 injections hurt
Immunogenicity: No Antibody Formation A critical safety consideration for any peptide therapy is immunogenicity, the potential to trigger immune system responses that could lead to allergic reactions, reduced efficacy through antibody neutralization, or autoimmune complications
Another option for vitamin B12 supply, which is given in particular in the case of a clinically manifest deficiency, is the parenteral form or vitamin B12 injections
Dynamic interactions of ABHD5 with PNPLA3 regulate triacylglycerol metabolism in brown adipocytes
Early human safety work suggested AOD-9604 was generally well tolerated, with a placebo-like adverse-event profile and no IGF-1 elevation [5] [6]