Synopsis

Source of validity: Scientific
Rating (out of 5): 2

Polydextrose is a synthetic polymer of glucose that functions as a soluble fiber and prebiotic. There is some scientific evidence supporting its use in the dietary management of Irritable Bowel Syndrome (IBS), though the evidence is limited and of modest quality. Polydextrose can increase stool bulk and frequency, which may be beneficial for individuals with IBS, particularly those with constipation-predominant symptoms (IBS-C). Several small clinical studies and reviews suggest that polydextrose can help improve bowel regularity and stool consistency in both healthy individuals and those with mild functional bowel disorders. For example, a 2015 randomized controlled trial published in the Journal of Clinical Gastroenterology found that polydextrose supplementation improved stool frequency and consistency in adults with constipation. Additionally, polydextrose may modulate the gut microbiota, increasing the abundance of beneficial bacteria such as bifidobacteria, which could have a positive impact on gut health.

However, evidence directly supporting polydextrose for IBS specifically is limited, and most studies focus on its general fiber and prebiotic effects rather than targeted IBS outcomes. Furthermore, some individuals with IBS may experience increased bloating or discomfort when consuming fermentable fibers like polydextrose. Current clinical guidelines for IBS dietary management do not specifically recommend polydextrose, but acknowledge that fiber supplementation, in general, can help some patients. More robust trials are needed to clarify polydextrose's role in IBS management.

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