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Unlike fat-soluble vitamins, B12 is absorbed in the small intestine through a complex process that depends on intrinsic factora protein made in the stomach
Homocysteine Lowering B Vitamins: B12 Shots & B12 Injections: Investigating the Good, Bad, and Alternative
Gene expression Which genes are switched on or off, and how strongly, in a cell
Peer review Peer review information Nature Chemical Biology thanks Francesco Peri, Zhirong Zhang and the other, anonymous reviewers for their contribution to the peer review of this work
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