Hidden lactose intolerance may be causing your IBS symptoms

NCT ID NCT06931379

First seen Jun 24, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This study will test 70 people with IBS-related diarrhea to see how many actually have lactose intolerance. Researchers will use a PCR test and a symptom questionnaire to find links with age and gender. The goal is to better understand if lactose intolerance is a common, overlooked cause of chronic diarrhea.

What this could mean

Our plain-language read of the trial. This is informational only — not medical advice or a prediction.

What this could lead to
If successful, this could help doctors better identify lactose intolerance as a hidden cause of chronic diarrhea in IBS patients.
What could go wrong
This is a small, early-stage observational study with only 70 participants, so results may not apply to everyone. It does not test any treatment.

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Conditions

The condition(s) this trial relates to.

As listed by the trial registrant

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