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 CYANOCOBALAMIN INJECTION, USP 30000 mcg 30 mL (1000 mcg mL) 30 mL VIAL Do You Need a Prescription for B12 Injections? OmegaQuant Vitamin B12 Injection Dose For Adults Consensus Academic Search Engine How Often Should You Get B12 Injections? Infusion For Health B12 Shots at Home: How, Where & How Often to Inject Yourself AZ IV Medics