How to self inject intramuscular vitamin B12 Overview Guy's and St Thomas' NHS Foundation Trust B12 Injections CryoBody Sutton Coldfield Birmingham B 12 (Methylcobalamin) Therapy MedClub by Dr Jenn Ivy Grove Surgery : Self administration of B12 injection Injecting B12 Enhance Me Training Academy Subcutaneous (SC) and Intramuscular (IM) Injections Must Knows for Subcutaneous administration: Pinch skin with non dominant hand and hold syringe with dominant hand Always inject: 2 inches away from umbilicus (for abdomen) 3 inches