Vitamin B12 Injections: Benefits, Safety & How They Work How to Give a B12 Injection: Step By Step Instructions HOW TO SELF INJECT B12 AT HOME with Dr. Tyler Rogers If you've been prescribed vitamin B12 shots or exploring at home wellness, this step by step guide will walk you through how How to Give Yourself a B12 Injection ThinWorks Dr. prescribed B12 injections. Pharmacy only gave me vials. Where do you get your needles and syringes? What size?? Where do I inject? : r B12_Deficiency How to self inject intramuscular vitamin B12 Overview Guy's and St Thomas' NHS Foundation Trust