How to Give a B12 Injection: Step By Step Instructions Best Vitamin B12 Injection Sites: Where to Inject B12 PA Relief CYANOCOBALAMIN INJECTION, USP 30000 mcg 30 mL (1000 mcg mL) 30 mL VIAL 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 How to Give a B12 Injection: Step By Step Instructions