What are the benefits of B12 injection? Blades Wellness FREE B12 injections the month of October no purchase necessary. 1 per a person. This is to show appreciation to our customers. It also allows new clients the opportunity to try vitamin Vitamin B12 Injection When? Frequency, Benefits & Indications Cyanocobalamin B12 Injection: Energy & Nerve Health Boost Mountainside Medical 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 Oral vs. Intramuscular Vitamin B12 in Vitamin B12 Deficiency The Blood Project