How Can Vitamin B12 Shots Help Me Feel Refreshed Dr. Nasseri If you have a low vitamin B12 level, injections can go a long way toward improving your health and well being. But if your B12 level is normal, don't fall for claims that B 12 Injections Specialists in San Antonio, TX How to Give a B12 Injection: Step By Step Instructions 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