Intramuscular injection is shown at 90 because the goal is to reach the muscle, the deepest layer in this comparison. That route is chosen when medication needs reliable absorption through the muscle's Subcutaneous (SC) and Intramuscular (IM) Injections Must Knows for Subcutaneous administration: Pinch skin with non dominant hand and hold syringe with dominant hand Always inject: 2 inches away from umbilicus (for abdomen) 3 inches Best Vitamin B12 Injection Sites: Where to Inject B12 PA Relief Vitamin B12 & C Injections VENTROGLUTEAL IM INJECTION SITE The **safest intramuscular injection site**, located away from the sciatic nerve. Preferred for adults and children (>7 months) due to thick muscle mass, minimal fat layer, and Best Vitamin B12 Injection Sites? ThinWorks