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Clinical Trials: Gastrointestinal (Stomach, Bowel, Etc.)
IRB No. 19-121JS-1: Ellagic Acid, Urolithins and Colonic Microbial Communities Affected by Walnut Consumption
The purpose of this study is to investigate whether adding walnuts to your diet can have a beneficial effect on your colon. Walnuts contain a natural compound called ellagitannin that is broken down in the stomach to ellagic acid. Ellagic acid is further broken down by your gut microbiota into a group of polyphenolic compounds called urolithins that have powerful anti-inflammatory actions. The gut microbiota is defined as the community of bacteria, fungi, viruses, etc. that live in your gut. Increasing evidence suggests that polyphenol consumption is associated with lower risk of colorectal cancer. We aim to investigate how a person's gut microbiome may contribute to your ability to form these powerful antioxidant urolithin compounds. Antioxidants are a group of substances that have the ability to reduce inflammation. In this study, we will collect demographic information and dietary records, and perform tests on proteins, DNA and/or RNA from samples of colon biopsies, blood, stool and urine to investigate how a person's microbiome may contribute to their ability to form urolithins.