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While some places might market it for general energy boosts or weight loss, if your B12 levels are already normal, there's little scientific proof that these injections will give you a significant energy rush or help you lose weight
Elfakhani M, Torabi S, Hussein D, Mills N, Verbeck GF, Mo H
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Labrecque J et al
Other common side effects of B12 injections include: Diarrhea Headache Swelling (and not only at the site of the injection) If you experience any uncommon side effects, such as chest pain or hives, contact your health care provider immediately
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