Overview
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.
Eligibility
Inclusion Criteria:
- Aged 18-30 years old
- Able to give written informed consent.
- BMI 18.5-24.9 kg/m2
- Healthy (self-reported)
- Can read and speak English
Exclusion Criteria:
- Currently taking medications that interfere with polyphenol
- Currently using or have used antibiotics continuously for >3 days within 3 months prior to enrollment
- Have had surgery involving the intestinal lumen within the last 30 days
- Have a documented diagnosis of celiac disease or/and inflammatory bowel diseases
- Are pregnant or breastfeeding
- Have prediabetes and diabetes
- Have had bariatric surgery
- Are immunocompromised ( e.g., cancer treatment, bone marrow/organ transplant, immune deficiency, or poorly controlled HIV/AIDS)
- Are unable to provide consent
- Are hospitalized,
- Have a history of or current alcohol, drug, or medication abuse (self-reported),
- Have contraindication to any substance in the investigational product or who are currently enrolled in other interventional trials