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Study details
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Prebiotic Effects of California Grapes on Gut Health and Cardiometabolic Health in Overweight Men and Women

University of California, Davis
NCT IDNCT06544954ClinicalTrials.gov data as of Apr 2026
Target enrollment

40

Study length

about 1.2 years

Ages

45–70

Locations

1 site in CA

About this study

This trial is testing if eating freeze-dried grape powder can improve gut health, blood pressure, inflammation, and vascular function in overweight men and women. Participants will take either grape powder or a placebo powder for 425 days and provide samples of their stool and blood.

Based on ClinicalTrials.gov records.

What participants do

  • 1.Freeze-dried grape powder
  • 2.Placebo powder
Primary goalArterial stiffness Change from Baseline

Participation effort

Estimated from trial records. Details can vary by site.

Time + visits
Low12%
Logistics
Moderate50%

Logistics difficulty varies by site location and availability.

Trial highlights

Treatment details

Auto-extracted from trial records to preview treatments and outcomes.

Endpoints

Primary: Arterial stiffness Change from Baseline, Blood pressure Change from Baseline, Gut microbiome composition Change from Baseline, Gut permeability markers Change from Baseline, Lipid and metabolic profiles Change from Baseline, Systemic inflammatory markers Change from Baseline

Secondary: Global gene expression Change from Baseline, Gut permeability marker Change from Baseline, Metabolomics and Lipidomics Change from Baseline