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Presented for research literature review only Zhu H et al
Ann Pharmacother 36: 1268-1272
Neelakantan H, Wang HY, Vance V, et al
[39] The elderly are at increased risk because they tend to produce less stomach acid as they age, a condition known as achlorhydria, thereby increasing their probability of B 12 deficiency due to reduced absorption
The answer determines which route makes sense
mass-spectrometric identity confirmation is required to establish which of the two compounds is present in a given sample
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