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More minor allergic signs, like itching spreading beyond the injection site or mild rash, warrant discontinuing use and monitoring
This rigorous methodology minimizes bias and allows for accurate attribution of adverse effects to the intervention rather than background health conditions or placebo effects
Frequently Asked Questions How fast do B12 shots work
Additional information Peer review information Nature Metabolism thanks Dominique Langin and the other, anonymous reviewers for their contribution to the peer review of this work
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