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 Best Vitamin B12 Injection Sites MedHealth 360 B12 Shots for Weight Loss: What You Need to Know ISSA What Happens If You Inject B12 Into Fat? PA Relief How to Administer an Intramuscular Injection at Home Types of injections explained! Understanding the angles: intramuscular (im) : injects deep into the muscle at 90. subcutaneous (sc) : goes under the skin at 45. intravenous (iv) :