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Protein shake vs. gut trouble: can whey help athletes digest fructose after heat stress?

NCT ID NCT06648967

Completed Knowledge-focused Sponsor: Arizona State University Source: ClinicalTrials.gov ↗

First seen Jul 24, 2026 · Last updated Jul 24, 2026

Summary

This pilot study tests whether a multi-ingredient whey supplement can reduce fructose malabsorption in healthy adults after hiking under heat stress. Eight participants will consume fructose and have their breath hydrogen measured as a marker of malabsorption, both before and after 3 to 5 weeks of daily protein supplementation. The goal is to better understand exercise-related gut distress, which affects up to 90% of athletes.

What this could mean

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

Active substance
a multi-ingredient fermented whey supplement
What this could lead to
If it works, this could point toward dietary strategies to reduce exercise-related gut distress in athletes.
What could go wrong
This is a very small pilot study with only 8 participants, so results may not apply broadly. The intervention is a supplement, not a drug, and effects may be modest.

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Conditions

The condition(s) this trial relates to.

malabsorption syndrome multiple endocrine neoplasia type 1

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

QUALITY OF LIFE

Contacts and locations

Locations

  • Health Futures Center

    Phoenix, Arizona, 85054, United States

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