Intestinal mucosal barrier in functional constipation: Dose it change?

Figure 6 Serum D-lactic acid and zonulin levels in healthy controls and patients with functional constipation. A: Serum D-lactic acid levels; B: Serum zonulin levels. No significant differences in D-lactic acid or zonulin levels were found between healthy controls and functional constipation patients. The box indicates the interquartile range; the line inside the box indicates the median value; the two whiskers indicate the maximum and minimum of the data. FC: Functional constipation.