B12 Injections vs Supplements: 16 Key Facts Explained 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 A vitamin B12 injection is a shot that delivers B12 directly into your muscle, helping your body absorb it quickly (especially if your body struggles to absorb it from food or tablets) Vitamin B12 Injections Clinic Near Me in Shoreline WA Optimal Vitamin B12 Dosage and Treating Deficiency B12 Injections vs Pills Baltimore: Which Works?