how does b12 injection work Vitamin Injections B12 Shots vs. IV Infusions:

Important Safety Information Do not use AOD-9604 if you: Have active cancer or malignancy (use only under medical supervision with appropriate monitoring) Are pregnant or breastfeeding (safety data lacking in these populations) Have known allergy to growth hormone fragments or peptide compounds Have severe uncontrolled metabolic or cardiovascular disease without medical supervision Common side effects may include: Injection site reactions (mild redness, swelling, or tenderness), occasional mild headaches during initial use, and transient lightheadedness

It binds to transport proteins, primarily transcobalamin II , which delivers B12 to tissues throughout the body

Its found in certain foods and also made in a lab

My personal experience of being told by some doctors I'm now sorted as B12 replete so no longer b12 deficient is incorrect