Grape powder may help aging immune systems — a trial puts it to the test

NCT ID NCT07079982

Recruiting now Prevention Sponsor: University of Connecticut Source: ClinicalTrials.gov ↗

First seen Aug 12, 2026 · Last updated Aug 13, 2026 · Updated 1 time

Summary

This study tests whether daily consumption of freeze-dried grape powder can improve immune function and reduce inflammation in healthy adults aged 50 to 75. Participants will drink a grape powder beverage or a placebo for four weeks each, while avoiding grapes and other polyphenol-rich foods. Researchers will measure immune markers and inflammatory responses from blood samples to see if grapes can positively influence age-related changes in immunity.

What this could mean

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

Active substance: Freeze-dried whole grape powder
What this could lead to: If it works, this could point toward a simple dietary addition that supports immune health and reduces inflammation in older adults.
What could go wrong: This is a small, early-stage study, and the effects may be modest or not translate to real-world benefits. Participants must avoid grapes and other polyphenol-rich foods, which may be challenging.

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Conditions

The condition(s) this trial relates to.

Inflammation inflammatory disease

As listed by the trial registrant

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

HEALTHY AGING INFLAMMATION

Contacts and locations

Locations

Department of Nutritional Sciences
RECRUITING

Storrs, Connecticut, 06269, United States

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