Synopsis

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

Inulin, a type of fermentable prebiotic fiber found in plants such as chicory root, has been investigated for its effects on gut health, including in people with Irritable Bowel Syndrome (IBS). The rationale for its use is based on its ability to stimulate the growth of beneficial bacteria, such as Bifidobacteria, in the colon. Some scientific studies suggest that prebiotics like inulin may help improve certain IBS symptoms, such as stool frequency in constipation-predominant IBS (IBS-C), by increasing short-chain fatty acid production and modulating the gut microbiota. However, the evidence is mixed. While low doses of inulin (≤5g/day) may offer mild benefits, higher doses often exacerbate symptoms such as bloating, gas, and abdominal discomfort, especially in individuals with IBS who tend to be sensitive to FODMAPs (fermentable oligo-, di-, monosaccharides, and polyols) — a category that includes inulin. Clinical guidelines do not routinely recommend inulin supplementation for IBS, and some suggest IBS patients may benefit from reducing inulin-rich foods. Overall, the scientific evidence supporting inulin’s benefit is limited and inconsistent, with more robust studies needed. Thus, inulin is sometimes used based on its general benefits for gut health, but its application in IBS is not strongly validated and is approached with caution due to the risk of worsening symptoms in some patients.

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Other ingredients used for Irritable Bowel Syndrome

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