where to inject vitamin b12

Vitamin B12 is injected intramuscularly into the ventrogluteal muscle on the hip, the vastus lateralis muscle on the outer thigh, or the deltoid muscle on the upper arm, using a 1-inch to 1.5-inch needle at a 90-degree angle, and the non-negotiable first step before any self-injection is confirming with the prescribing physician that you have…