But many of the products have never been extensively studied in humans, raising concerns that they could cause allergic reactions, metabolic problems and other dangerous side effects
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B12 shots deliver a concentrated amount of cobalamin, a water-soluble vitamin essential for red blood cell formation, neurological function, and DNA synthesis, as detailed in the NIH fact sheet on vitamin B12
*Correspondence: Weina Li, [email protected] Meng Li, [email protected] These authors have contributed equally to this work This article was submitted to Drug Metabolism and Transport, a section of the journal Frontiers in Pharmacology Disclaimer All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers
