Synopsis

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

Citrus fiber, derived from the peels and pulp of citrus fruits, is a source of dietary fiber that has been studied for its potential role in supporting gastrointestinal health, including in individuals with Irritable Bowel Syndrome (IBS). The evidence supporting its use is mostly extrapolated from broader research on soluble and insoluble fibers rather than studies specific to citrus fiber itself. In clinical practice, dietary fiber is often recommended as part of IBS management, especially for patients with constipation-predominant IBS (IBS-C). Soluble fibers, such as those from psyllium, have shown the most benefit in randomized controlled trials. Citrus fiber contains both soluble and insoluble components and may act similarly by increasing stool bulk, improving bowel regularity, and modulating gut microbiota. Some preclinical and small clinical studies suggest that citrus pectin, a soluble fiber from citrus, may have prebiotic effects and support gut health, but these findings are not robustly replicated in large IBS-specific trials. Overall, while there is scientific plausibility and some indirect evidence that citrus fiber could be beneficial for IBS symptoms, especially constipation, direct high-quality clinical evidence is limited. Therefore, its use is primarily justified by extension from the well-established effects of other fibers rather than conclusive studies on citrus fiber itself.

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