Benefits of a Vitamin B12 Injection, Vitamin B12 injections are commonly used for people who are deficient, struggle to absorb B12 from tablets, or require a faster and more effective boost., Helps Vitamin B12 injection Redwood Pharmacy B12 Injections: How They Work and Who Needs Them Meo Nutrition 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 Do You Need a Prescription for B12 Injections? OmegaQuant