NCT07079982 Effects of Freeze-dried Grape Powder on Immune Profiles in Healthy Aging Adults
| NCT ID | NCT07079982 |
| Status | Recruiting |
| Phase | — |
| Sponsor | University of Connecticut |
| Condition | Healthy Aging |
| Study Type | INTERVENTIONAL |
| Enrollment | 28 participants |
| Start Date | 2025-07-25 |
| Primary Completion | 2027-06 |
Eligibility & Interventions
Eligibility Fast-Check
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What to Expect as a Participant
You will actively receive the study intervention — which may be a drug, biologic, device, or procedure.
This trial targets 28 participants in total. It began in 2025-07-25 with a primary completion date of 2027-06.
⚠ This information is for research awareness only. Always consult your physician before joining any clinical trial. Participation is voluntary and you may withdraw at any time.
Brief Summary
The purpose of this study is to investigate the effects of consuming grape powder on immune profiles in healthy middle- and older-aged individuals. Specifically, the investigators are interested in evaluating the potential effects of grapes in influencing markers of immune function, inflammation, and metabolism that are known to change with aging. Grapes contain several nutrients and antioxidant polyphenols such as resveratrol, quercetin, vitamin K and fiber, which are known to promote heart and immune health. However, the effects of grapes on altering immune profiles within the context of aging is not well understood. Therefore, this study will explore how daily grape consumption impacts certain markers of immunity in healthy middle- and older-aged adults. The main study procedures include consumption of a freeze-dried grape powder and control powder (which tastes the same but has none of the grape compounds that are being studied) mixed with water as a beverage on a daily basis for 4 weeks each. The investigators will additionally ask that participants avoid eating grapes and certain other antioxidant/grape-related foods and beverages throughout the 13-week study. Participants will additionally be asked to complete surveys about their diet, physical activity, and medical history, as well as provide blood samples and body weight measures throughout the course of the study. Participation in the study is expected to last about 6.25 hours over the course of 13 weeks and will include 7 visits.
Eligibility Criteria
Inclusion Criteria: * 50-75 years old (at time of screening) * Body mass index (BMI) 18.5 to \< 30 kg/m2 * Willing to consume grape and control powder during study periods, and refrain from eating grapes and certain other polyphenol-rich foods and beverages during the study * Do not fit any exclusion criteria Exclusion Criteria: * \<50 years old and \>75 years old * BMI \<18.5 and ≥ 30 kg/m2 or body weight \< 110 pounds * Experienced \>10% weight change in the past 4 weeks * Elevated fasting glucose levels (fasting glucose higher than 126 mg/dL) and triglycerides greater than 500 mg/dL * Self-reported and/or physician-diagnosed history of diabetes mellitus, coronary heart disease, stroke, renal or liver disease, cancer, eating disorders, certain severe and/or relapsing/remitting autoimmune, inflammatory, or metabolic diseases, chronic infections, scleroderma, blood clotting disorders, intravenous drug use, or current pregnancy or lactation * Allergy to grapes or any ingredients in the grape or control powders * Implanted medical device (e.g., pacemaker) or other health condition that would prevent measurement of body composition by bioelectrical impedance * Currently taking lipid-lowering medications (e.g., statins, fibrates), glucose-regulating medications, anti-inflammatory medications (e.g., non-steroidal anti-inflammatory drugs (NSAIDs), corticosteroids), or medications that primarily affect blood clotting (e.g., warfarin), long-term antibiotics in the last 3 months, active use of probiotics during the intervention * Active smoker
Contact & Investigator
Frequently Asked Questions
Who can join the NCT07079982 clinical trial?
This trial is open to participants of all sexes, aged 50 Years or older, up to 75 Years, studying Healthy Aging. Full inclusion and exclusion criteria are listed in the Eligibility Criteria section. Always confirm your eligibility with the research team before applying.
Is NCT07079982 currently recruiting?
Yes, NCT07079982 is actively recruiting participants. Contact the research team at catherine.andersen@uconn.edu for enrollment information.
Where is the NCT07079982 trial being conducted?
This trial is being conducted at Storrs, United States.
Who is sponsoring the NCT07079982 clinical trial?
NCT07079982 is sponsored by University of Connecticut. The trial plans to enroll 28 participants.