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 You Get B12 Injections? Gym goers spending monthly on vitamin B and C injections Have a f*cking word with yourself. Both are water soluble, so don't stick around for long in your system (12 14hrs) hence Best Vitamin B12 Injection Sites: Where to Inject B12 PA Relief B12 Injection: Boosting Energy and Beauty Med Spa Vienna Medical Spa Tysons Corner Rejuvenation Clinic When Should You Get a Vitamin B12 Injection? Soza Clinic