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*Correspondence: Bai-Rong Xia, [email protected] These authors have contributed equally to this work This article was submitted to Cancer Metabolism, a section of the journal Frontiers in Oncology 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

doi: 10.1016/s2542-5196(22)00090-0 150 BornmanMSAneck-HahnNHde JagerCWagenaarGMBouwmanHBarnhoornIEJet al

Conventional treatments have undesirable effects

This B12-intrinsic factor complex travels to the terminal ileum, where specialized receptors absorb it into the bloodstream