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 Choosing the Right Needle and Syringe for B12 Injections: A Complete Guide How to Give a B12 Injection: Step By Step Instructions a disposable syringe with a needle and an ampoule with red (vitamin B12) liquid in male hands in blue (lilac) nitrile gloves. On a white background Stock Photo Alamy Vitamin B12 Injection in Orlando, FL Nur Med Spa