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Biomarkers of intestinal barrier function and integrity before and after low FODMAPs diet. Panel (A) intestinal fatty acid-binding protein—I-FABP; panel (B) diamine oxidase—DAO; panel (C) serum zonulin; and panel (D) fecal zonulin. Data are presented as mean ± SD. Statistical analysis: Wilcoxon matched-pairs signed-rank test with a significant difference set at p < 0.05. The cutoff value is indicated by the red dashed line.
