Before giving yourself a B12 injection, ensure you have all the necessary supplies: a B12 vial, an alcohol swab, a syringe and needle, and a sharps disposal container
Severe allergic reaction/anaphylaxis Symptoms may include: Difficulty breathing or swallowing Swelling of the face, lips, tongue, or throat Severe rash, itching, or hives Chest tightness or palpitations
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By bypassing the gastrointestinal tract, vitamin B12 injections effectively restore normal levels of the vitamin, alleviating symptoms and preventing complications
How Much B12 Should Be Included in a Shot
For others, it takes a day or two