Fig. 1

Effect of the dietary intervention on serum (a) and faecal (b) calprotectin. Data are expressed as the median and interquartile range (IQR). Differences within groups were assessed using the Wilcoxon matched-pairs signed rank test. Data with asterisk are significantly different (p < 0.05). PR-diet, (poly)phenol-rich diet; C-diet, control diet