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Details of both MS methods are described in Targeted Metabolomics section (below)
doi: 10.2174/156720106777731118
Vegetarians and vegans, since B12 is primarily found in animal-based foods, may experience a deficiency that can become significant over time
Baar MP, Brandt RMC, Putavet DA, Klein JDD, Derks KWJ, Bourgeois BRM, Stryeck S, Rijksen Y, van Willigenburg H, Feijtel DA, van der Pluijm I, Essers J, van Cappellen WA, van IJcken WF, Houtsmuller AB, Pothof J, de Bruin RWF, Madl T, Hoeijmakers JHJ, Campisi J, de Keizer PLJ
Over 30 percent of Americans have at least one vitamin or mineral deficiency
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