places to inject b12 shots at Home: How, Where & How Often Yourself Best Vitamin B12 Injection Site:
Description
Vitamin B12 is needed to form red blood cells and DNA

Gaidamauskas E, Gyrup C, Boldt HB, Schack VR, Overgaard MT, Laursen LS, Oxvig C.IGF dependent modulation of IGF binding protein (IGFBP) proteolysis by pregnancy-associated plasma protein-A (PAPP-A): multiple PAPP-A-IGFBP interaction sites

Vitamin B12 injection IV or IM searches are common, but intravenous use should not be assumed unless a clinician specifically directs it
It creeps up on people