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doi: 10.3389/fchem.2025.1536858 Received 29 November 2024 Accepted 27 January 2025 Published 19 March 2025 Volume 13 - 2025 Edited by Federica Aureli, National Institute of Health (ISS), Italy Reviewed by Eric Deconinck, Sciensano (Belgium), Belgium Maria Cristina Gaudiano, National Institute of Health (ISS), Italy Updates Copyright 2025 Blazewicz, Poplawska, Daniszewska, Piorunska and Karynski
[1] [3] Hypersensitivity to cobalt or any cobalamin is a contraindication to B12 injections
The effects of a B12 injection typically last between one to two weeks, but this can vary based on your bodys needs and B12 levels
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