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 3mL 25G x 1" BD 305787 Luer Lok Syringe with BD Eclipse Safety MedNeedles US Red Liquid Vitamin B12 in a Disposable Syringe with a Needle and in a Glass Ampoule on a White Background. Stock Image Image of empty, ampoules: 252798523 B12 Injections: How Often Should You Take Them? Invigor Medical