Gut check: can fiber supplements work differently for different people?

NCT ID NCT05906589

First seen Jan 12, 2026 · Last updated Apr 30, 2026 · Updated 14 times

Summary

This study looked at how two types of dietary fiber—psyllium and inulin—affect gut bacteria and related substances in healthy adults over 60. Participants took each fiber (or a placebo) for two weeks, with breaks in between. The goal was to see if some people respond better to fiber than others, which could help personalize diet advice for gut health.

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Contacts and locations

Locations

  • Rowett Institute

    Aberdeen, AB25 2ZD, United Kingdom

Conditions

Explore the condition pages connected to this study.