How to self inject intramuscular vitamin B12 Overview Guy's and St Thomas' NHS Foundation Trust How SubQ Injections Like B12 and NAD+ Fit Your Routine Olympia Pharmaceuticals Safe B12 Injection Guide at Home Step by Step Tutorial YouTube Subcutaneous Injection Sites and Instructions for Safe Self Administration 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