Not all shots are the same here's a guide Injections are a fast, effective way to deliver medications, nutrients, and vaccines directly into the bodybut not all injections are the Subcutaneous Injection: What It Is and How to Give One Vitamin B12 Injection: Energy Boost and Anemia Treatment Mountainside Medical CYANOCOBALAMIN INJECTION, USP 30000 mcg 30 mL (1000 mcg mL) 30 mL VIAL Sandoz Vitamin B12 Injectable Solution 1000 mcg 10 mL Vitamin B12 Treating Severe Vitamin B12 Deficiency B12 IM Injection