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 body but not all injections are the same. B12 vitamin Store Intramuscular vs Subcutaneous Injections for vitamin B12 supplements. How to Give B12 Injections at Home to Yourself PA Relief Cyanocobalamin (b12) Injection 2,000 mcg mL 30mL Conquer Pharma Intrav My Store B12 vitamin Store How to inject B12 in your arm