Clinical evidence indicates that specific types of dietary fiber and low-FODMAP diets can improve symptom severity and bowel habits in patients suffering from irritable bowel syndrome with constipation (IBS-C).
The claim specifically asserts that dietary fiber and low-FODMAP diets improve irritable bowel syndrome with constipation (IBS-C). Paper [8] details how specific fibers like psyllium effectively improve IBS symptoms including constipation-related parameters via increased fecal mass and peristalsis, and paper [9] specifically evaluates and finds significant improvements in IBS-C symptom scores following a low-FODMAP diet. Therefore, the evidence supports the claim.