contraindications to b12 injections What You Need Know About Vitamin B12 Course – Beauty &
Description
Research indicates it does not significantly impact insulin or IGF-1 levels, and it has not been shown to trigger antibody formation

doi:10.1152/physrev.1998.78.2.393

Cyanocobalamin Injection, USP is a sterile solution of cyanocobalamin (vitamin B) intended for intramuscular (IM) or subcutaneous (SC) injection

Lots of good instructions
Further Reading For additional peer-reviewed research, see: NNMT inhibitor preclinical study by Neelakantan et al
