Vitamin B12 Injection Manufacturer AdvaCare Pharma Vitamin B12 is required for the function and development of many parts of the body, including the brain, nerves, and blood cells Since your body doesn't make vitamin B12, you have to Benefits of B12 Injections for Optimal Health Vitamin B12 injections deliver high doses of this essential vitamin directly into your bloodstream for better absorption than oral supplements to boost energy, support red blood cell production and maintain nerve function. Vitamin B 12 Injectable for Horses, Dogs and Cats Jeffers