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Vegans, vegetarians, and people with restrictive diets may not consume enough B12, making ongoing injections valuable
Vitamin B12 absorption occurs primarily in the terminal ileum through intrinsic factor-mediated absorption (for both dietary and supplemental B12) and passive diffusion (particularly relevant for high-dose supplements)
Cassuto, J., & Sinclair, R
[PMID: 24438340] PubMed record related to this compound for laboratory literature review
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