B12 injections are an intramuscular shot of Vitamin B12 (typically in the form of cyanocobalamin or methylcobalamin) that delivers the vitamin directly into the bloodstream
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However, it never received FDA approval because the results, while positive, weren't dramatic enough to meet regulatory thresholds for an obesity drug
In practice a GP or nurse may administer off-licence by giving a sub-cutaneous (under the skin, SC) injection but it is important to remember that the GP makes their own decision and takes their own accountability and reliability if they go off-licence
Patients may receive weekly or bi-weekly injections, but this can be adjusted based on your response and goals
** Product contains benzyl alcohol as an inactive ingredient Contraindications for Benzyl Alcohol This preparation is not advised in patients who are sensitive to cobalt and/or vitamin B12