Benefits of B12 Injections for Optimal Health Compounded Methylcobalamin (Vitamin B12) Injection, 5mg mL Instruction Guide for Intramuscular (IM) Self injection of B12 Methylcobalamin 1mg 5mg Efficacy of different routes of vitamin B12 supplementation for the treatment of patients with vitamin B12 deficiency: A systematic review and network meta analysis Irish Journal of Medical Science (1971 ) Vitamin B 12 intramuscular injections are also used therapeutically to help restore energy and combat various symptoms related to such deficiencies. Vitamin B 12 is essential to the development of healthy blood cells, nerve Instruction Guide for Intramuscular (IM) Self injection of B12 Methylcobalamin 1mg 5mg