Effects of Grape Powder on Psychological Distress and Gut Microbiota in College Students

The goal of this trial is to investigate the effect of freeze-dried table grape powder (FTGP) on psychological distress and gut microbiota in college students. The main questions it aims to answer are: Does FTGP reduce anxiety, depression, and perceived stress? Does FTGP improve the gut microbiota? Researchers will compare FTGP to a placebo to see how FTGP affects psychological distress and gut microbiota. Participants will: Drink a daily supplement containing FTGP or a placebo for 4 weeks. Record consumption of grape powder or placebo in a compliance log. Complete surveys and provide stool samples. Three in-person visits.

NCT Number	NCT07214428
Lead Sponsor	Rutgers, The State University of New Jersey Collaborators: California Table Grape Commission
Conditions	Gut Microbiota, Psychological Distress
Enrollment	50 participants
Start Date	2025-10-20
Primary Completion	2025-12-24 (estimated)
Study Completion	2026-12-31 (estimated)
Updated on ClinicalTrials.gov	2026-08-11