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 Everything You Need to Know About Vitamin B12 Injections Benefits of Vitamin B12 Injections for Skin 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 B12 level 99 ng L. Is this really low or just a little low? How often for injections? : r B12_Deficiency Pernicious Anemia: Definition, Symptoms, Causes & Treatment