How to Give a B12 Injection: Step By Step Instructions On The Go B12 Injection at enTrust Urgent Care Center Clinic Main benefits of B12 injections 1) Increased energy & reduced fatigue B12 helps convert food into usable energy Deficiency often causes tiredness, weakness, and low stamina 2) Healthy red blood cells Prevents Cobalamin (vitamin B12) and Folate Deficiency Province of British Columbia B12 Shots at Home: How, Where & How Often to Inject Yourself AZ IV Medics