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[DOI] [PMC free article] [PubMed] [Google Scholar] 339.Wolfram-Schauerte, M

Most manage well with fortified foods or a supplement, and the Vegan Society sets out simple oral options that work for the majority without any injection at all

Because the body is efficient at excreting excess B12 through urine, there is no established tolerable upper intake level (UL) for the vitamin
