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Microbial function and plasma VB12 level differences between H. pylori‐negative and H. pylori‐positive groups. (A–C) The function reporter score bar plot of cofactor and vitamin biosynthesis, cellular processes, and human diseases. (D) Differences in the level of plasma VB12 between H. pylori‐negative and H. pylori‐positive groups (P < 0.05, Wilcoxon test).
