Effects of a dietary supplement on gut health

A Randomized, Double-Blind, Placebo-Controlled, Parallel Study to Investigate the Effects of a Dietary Supplement Containing N-trans-Caffeoyltyramine (NCT) and N-trans-Feruloyltyramine (NFT) on Gastrointestinal Barrier Function

Not applicable Interventional Brightseed · NCT06262880

This study tests if a plant-based dietary supplement can improve gut health in healthy adults who have risk factors for digestive issues compared to a placebo.

Quick facts

PhaseNot applicable
Study typeInterventional
Enrollment126 (estimated)
Ages30 Years to 69 Years
SexAll
SponsorBrightseed Industry-sponsored
Locations1 site (Addison, Illinois)
Trial IDNCT06262880 on ClinicalTrials.gov

What this trial studies

This study examines how a dietary supplement containing plant-derived phenolics affects gastrointestinal health in healthy adults with risk factors for increased intestinal permeability. Participants will receive either the supplement at two different doses or a placebo. The primary goal is to determine if the supplementation improves gut health compared to the placebo group. The study will monitor various parameters related to gastrointestinal function over the course of the intervention.

Who should consider this trial

Good fit: Ideal candidates are generally healthy adults aged 30-69 with a BMI of 29.0 to less than 40.0 and specific waist circumference measurements indicating risk factors for GI permeability.

Not a fit: Patients who do not meet the eligibility criteria, such as those with a BMI below 29.0 or above 40.0, or those with significant health conditions, may not benefit from this study.

Why it matters

Potential benefit: If successful, this study could lead to improved gastrointestinal health for individuals at risk of increased intestinal permeability.

How similar studies have performed: While there is ongoing interest in dietary supplements for gut health, this specific approach using plant-derived phenolics is relatively novel and has not been extensively tested in similar studies.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

1. Male or female, 30-69 years of age, inclusive at Visit 1 (Day -7).
2. BMI of ≥29.0 to \<40.0 kg/m2 at Visit 1 (Day -7).
3. Waist circumference \>102 cm for men and \>88 cm for women.
4. Non-user or former user (cessation ≥12 months) of tobacco or nicotine products (e.g., cigarette smoking, vaping, chewing tobacco) with no plans to begin use during the study period.
5. Non-user of marijuana or hemp products within 6 months of Visit 1, with no plans to begin use during the study period. A washout of 7 days is required for topical products (e.g., lotions) and willing to refrain from use during the study.
6. Willing to maintain physical activity and exercise patterns, body weight, and habitual diet throughout the trial.
7. Willing to refrain from exclusionary medications, supplements, and products throughout the study.
8. No health conditions that would prevent him/her from fulfilling the study requirements as judged by the Clinical Investigator on the basis of medical history and routine laboratory test results.
9. Understands the study procedures and signs forms providing informed consent to participate in the study and authorizes the release of relevant protected health information to the Clinical Investigator.

Exclusion Criteria:

1. Known sensitivity, intolerance, or allergy to any of the study products or their excipients.
2. Abnormal chemistry or hematology laboratory test result(s) of clinical significance at Visit 1 (Day -7), at the discretion of the Clinical Investigator. One re-test will be allowed on a separate day prior to Visit 2 (Day 0), for subjects with abnormal laboratory test results.
3. Clinically important diagnosed GI condition that would potentially interfere with the evaluation of the study product (e.g., inflammatory bowel disease, irritable bowel syndrome, gastroparesis / malabsorption conditions, eosinophilic disorders of the GI tract, and clinically significant lactose or gluten intolerance or other food allergies).
4. Recent (within 2 weeks of Visit 1; Day -7) history of an episode of acute GI illness such as nausea/vomiting or diarrhea (defined as ≥3 loose or liquid stools/d).
5. Self-reported history (within 6 weeks of Visit 1; Day -7) of constipation (defined as \<3 bowel movements per week).
6. Uncontrolled and/or clinically important pulmonary (including uncontrolled asthma), cardiac (including, but not limited to, atherosclerotic disease, history of myocardial infarction, peripheral arterial disease, stroke), hepatic, renal, endocrine (including Type 1 and Type 2 diabetes mellitus), hematologic, immunologic, neurologic (e.g., Parkinson's disease, multiple sclerosis, etc.), psychiatric (including depression and/or anxiety disorders) or biliary disorders. Conditions which are well-controlled or resolved will be assessed by the Clinical Investigator on a case-by-case basis.
7. Uncontrolled hypertension (systolic blood pressure ≥140 mm Hg or diastolic blood pressure ≥90 mm Hg) as defined by the blood pressure measured at Visit 1 (Day -7). Stable use of hypertension medication is allowed \[defined as no change in medication regimen within the 3 months prior to Visit 1 (Day -7)\].
8. Received a COVID-19 vaccine within 2 weeks of Visit 1 (Day -7) or expect to receive a COVID-19 vaccine during the study period.
9. Received an influenza vaccine within 1 week of Visit 1 (Day -7). Influenza vaccine is allowed during the study but must not be received within 7 days prior to a study visit.
10. Had a positive SARS-CoV2 test and experienced symptoms for \>2 months (i.e., "long-haulers").
11. Extreme dietary habits (e.g., ketogenic, very high protein, very high fiber, vegan/vegetarian) at the discretion of the Clinical Investigator.
12. History or presence of cancer (including any malignant GI polyps) within 2 years of Visit 1 (Day -7), except for non-melanoma skin cancer.
13. Major trauma or any other surgical event, including abdominal surgery which might influence GI function, within 3 months of Visit 1 (Day -7).
14. Signs or symptoms of an active infection of clinical relevance\* within 5 days of Visit 1 (Day -7). The visit may be rescheduled such that all signs and symptoms have resolved (at the discretion of the Clinical Investigator) at least 5 days prior to Visit 1 (Day -7).
15. Antibiotic use within 1 month of Visit 1 (Day -7) and throughout the study period.
16. Regular use (i.e., \>3 days/week) of anti-inflammatory medications (e.g., NSAIDS) within 1 month of Visit 1 (Day -7).
17. Use of medications (over-the-counter or prescription) and/or dietary supplements known to influence GI function, including but not limited to, pre- and probiotic supplements as well as foods or beverages containing live probiotics (e.g., yogurt, kombucha), fiber supplements, laxatives, enemas, suppositories, histamine H2 receptor antagonists, proton pump inhibitors, antacids, anti-diarrheal agents, and/or anti-spasmodic within 2 weeks of Visit 1 (Day -7) and throughout the study period. Standard multivitamin and mineral supplements are allowed.
18. Had a colonoscopy or endoscopy within 1 month prior to Visit 1 (Day -7).
19. Exposure to any non-registered drug product within 4 weeks prior to Visit 1 (Day -7).
20. Female who is pregnant, planning to be pregnant during the study period, lactating, or is of childbearing potential and is unwilling to commit to the use of a medically approved form of contraception throughout the study period. Subjects who are pregnant during the study will be discontinued.
21. Female subjects who is unwilling to wear a tampon during the collection of the 24-h urine samples when these collections occur during the time of menstruation
22. Recent history (within 12 months of screening; Visit 1; Day -7) of alcohol or substance abuse. Alcohol abuse is defined as \>14 drinks per week (1 drink = 12 oz beer, 5 oz wine, or 1½ oz distilled spirits).
23. Has a condition the Clinical Investigator believes would interfere with his ability to provide informed consent, comply with the study protocol, which might confound the interpretation of the study results, or put the subject at undue risk.

    * If an infection occurs during the study period, test visits will be rescheduled until signs and symptoms have resolved (at the discretion of the Clinical Investigator) at least 5 days prior to the scheduled study visits.

Where this trial is running

Addison, Illinois

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.
Conditions Intestinal Permeability
Last reviewed 2026-06-13 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.