Vitamin B12 shots: Uses, benefits, and side effects When Should You Get a Vitamin B12 Injection? Soza 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 How Often Should I Take Vitamin B12 Injections Oral vs. Intramuscular Vitamin B12 in Vitamin B12 Deficiency The Blood Project What are Vitamin B12 injections Vitamin B12 injections are used to quickly raise your B12 levels when they're low or when your body can't absorb it properly from food or tablets. What