Vital Flow offers B12 injections with safe, effective administration at key injection sites for optimal absorption. Common sites include the upper arm (deltoid), outer thigh (vastus lateralis), and hip (ventrogluteal) for intramuscular injections, or the abdomen and back of the upper arm for subcutaneous injections. Our mobile service ensures convenient, expert care wherever you are. https://www.vital-flo.com/post/how-to-give-a-b12-injection