How Often Should You Get Vitamin B12 Injections? B12 Injection Frequency: How Often Should You Get a B12 Shot? Liv Hospital Best Time to Take Vitamin B12: Morning or Night? (2026) Future Kind B12 Injection Frequency: How Often Should You Get a B12 Shot? Liv Hospital 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 B12 Injections Botox Boutique