Walnuts and Colon Health

Description

The purpose of this research study is to examine whether adding walnuts to your diet can have a beneficial effect on the gut bacteria population, inflammatory markers in the blood, and the tissue that lines the inside of the colon.

Conditions

Colorectal Cancer, Diet Habit

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Study Overview

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Study Details

Study overview

The purpose of this research study is to examine whether adding walnuts to your diet can have a beneficial effect on the gut bacteria population, inflammatory markers in the blood, and the tissue that lines the inside of the colon.

Microbiota, Metabolites and Colon Neoplasia

Walnuts and Colon Health

Condition
Colorectal Cancer
Intervention / Treatment

-

Contacts and Locations

Farmington

UConn Health, Farmington, Connecticut, United States, 06032

New York

Weill Cornell Medicine, New York, New York, United States, 10065

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

For general information about clinical research, read Learn About Studies.

Eligibility Criteria

  • * Men and women between the ages of 39-75 years old who meet the criteria of one of the following groups and are eligible to undergo a routine screening or surveillance colonoscopy for colorectal cancer (CRC):
  • 1. Individuals who have a family history of CRC in a first-degree relative diagnosed with CRC under the age of 65 years, or
  • 2. Individuals who are referred for colonoscopy following a positive fecal immunochemical test (FIT) or a positive Cologuard screening test and have not had a high-quality colonoscopy in the past 3 years, or
  • 3. Individuals who have a personal history of colon polyps
  • * Willing and able to provide written informed consent for study participation
  • * Willing to consume 2 ounces (56 grams) of walnuts daily for 3 weeks
  • * Willing to avoid intake of EA/ET-rich foods (e.g., pomegranates, hazelnuts, pistachios, strawberries, raspberries, blackberries, oak-aged wines, and other food on a list given by researchers) and fermented dairy products containing viable Bifidobacteria or Lactobacilli)
  • * Willing to stop taking dietary supplements, including probiotics
  • * Willing to have two separate blood draws, as well as urine and stool collections
  • * Willingness to comply with all study requirements
  • * Individual has a personal history of CRC, or a history of any malignancy (other than skin cancer) within the past 5 years
  • * Individual meets the Amsterdam criteria for Lynch Syndrome or has a history of familial adenomatous polyposis (FAP)
  • * Individual has been treated with immunosuppressive agents or systemic steroids, excluding inhalers, at least two weeks prior to the Screening Visit and for the duration of the study
  • * Use of antibiotics at least one month prior to the Screening Visit and for the duration of the study
  • * Patients with severe medical illness or those at high risk for anesthesia, as determined by good clinical practice
  • * Current evidence or previous history of ulcerative colitis or Crohn's disease
  • * Colonoscopy performed for reasons other than screening or surveillance for CRC
  • * HIV infection, chronic viral hepatitis
  • * Allergy to walnuts or hypersensitivity to tree nuts
  • * Peri-menopausal women with any chance or plan of pregnancy
  • * Individuals with blood coagulation disorders or on anti-coagulant therapy
  • * Any other condition that, in the opinion of the PI, might interfere with study objectives
  • * No race/ethnicity, language or gender exclusions for this study

Ages Eligible for Study

39 Years to 75 Years

Sexes Eligible for Study

ALL

Accepts Healthy Volunteers

Yes

Collaborators and Investigators

UConn Health,

Daniel W. Rosenberg, Ph.D., PRINCIPAL_INVESTIGATOR, UConn Health

Study Record Dates

2026-12-31