Fig. 2.

Effect of vitamin D supplementation on IBS symptoms. Participants were assessed every 2 weeks on their symptoms. In all plots, placebo arm is the open circle and active arm is the solid circle; plots show mean ± SEM at each timepoint. A Shows change in total symptoms across the course of the trial, Panel Ai shows actual symptom severity, Panel Aii shows change from baseline. B Shows each symptom score plotted in the same way. I–iv are, respectively, pain severity, days with pain, distention severity, satisfaction with bowel habit and affected life