Vitamin B12 Injections: Benefits for Your Health Vitamin B12 Oral vs Injection Healing After Harvey: B 12 for Chronic Fatigue, Stress & More Dr. Shel Wellness & Aesthetic Center Beat Holiday Fatigue with a B12 shot 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 Benefits of B12 Injections: Boosts energy levels & reduces fatigue Supports brain function & mental clarity Helps produce red blood cells Supports metabolism & overall wellness