Two Dietary Fibers May Cut Crohn’s Risk in Certain Patients

What To Know

A new cohort analysis of first-degree relatives (FDRs) of people with Crohn’s disease found higher habitual intakes of two specific fiber subtypes — beta‑glucan and inulin — were associated with about a 30% lower risk of developing Crohn’s disease over follow-up.

The study used food frequency questionnaires to estimate intake and included biomarker and stool microbiome analyses in a nested case–control subset.

Higher inulin and beta‑glucan intake were also linked to lower serum CRP, better intestinal permeability by lactulose‑to‑mannitol ratio, and reductions in a microbiome signal (notably Ruminococcus torques) previously tied to later Crohn’s risk. The authors and the Medscape report note that these are associations and do not establish causation.

Limitations include reliance on FFQs and food composition datasets that may misclassify fiber subtypes, potential residual confounding, and that the findings come from FDRs (people at elevated baseline risk), so generalizability may be limited.

If you’re considering dietary changes, discuss them with your care team — this study suggests promising directions for research but does not provide definitive clinical recommendations.