Lets do my first B12 injection together This is something Ive been nervous about for a long time, but today I finally did itand it honestly wasnt bad at all. I used the Union Medico needle guide How SubQ Injections Like B12 and NAD+ Fit Your Routine Olympia Pharmaceuticals How to Give Yourself a Subcutaneous Injection: An Introduction How To Self Administer Vitamin B12 Injections Invigor Medical Understanding the 4 main types of injections makes medical knowledge simple and clear. Intramuscular, Subcutaneous, Intradermal & Intravenous each one plays a different role in treatment. Stay informed, stay safe! B12 vitamin Store Intramuscular vs Subcutaneous Injections for vitamin B12 supplements.