Clinical Research Directory

Inclusion Criteria: * Age of 18 years or older * Scheduled for a colonoscopy or flexible sigmoidoscopy as part of the patient's standard care * Can provide informed consent Exclusion Criteria: * Subject is pregnant, a prisoner, or is under 18 years of age * Patient is not able to undergo colonoscopy or flexible sigmoidoscopy * Prior total proctocolectomy * History of inflammatory bowel disease * History of diabetes mellitus and are currently on medical diabetes therapy * History of chronic kidney disease with an eGFR \< 60 mL/min/1.73m2 * Cancer diagnosis where the subject is receiving active therapy * Use of either a ketogenic diet or intermittent fasting (defined as a fasting period of 16 hours or more per day that is not associated with a medical procedure) during the 4 weeks prior to enrollment