B12 injections have lots of benefits from just 1 dose. A dose can be given every 6 months to boost benefits, unless you have a b12 deficiency or pernicious anaemia with proof 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 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 How Do B12 Injections Enhance Your Vitality? Dr. Miami Beach The Truth About B12 Injections: Benefits, Cost & How They Work