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 How to self inject intramuscular vitamin B12 Overview Guy's and St Thomas' NHS Foundation Trust Pernicious Anemia: Treatment, Procedure, Cost, Recovery, Side Effects And More When that Vitamin B12 injection kicks in , B12 helps boost your energy, improve mood, support brain function & metabolism, and even strengthen hair, skin + nails , Who doesnt love a healthy