๐Ÿ›๏ธ Verified NIH Record โ€ข Updated 2026-01-13

Impact of Dietary Fiber Supplementation on Colonic Microbiome (NCT05643859)

Changes in Colonic Microbiome With Fiber Supplementation

๐ŸŸข Recruiting Observational / Diagnostic ๐Ÿฉบ Clinical Procedure Protocol Sponsor: OHSU Knight Cancer Institute

๐Ÿฉบ Plain-English Summary (8th-Grade Level)

This clinical trial tests whether daily fiber supplementation will change the mucosal microbiome of the colon. The microbiome are microorganisms that live in the human gut. They serve a vital role in maintaining health. Certain microbial strains are associated with the growth of colon polyps, which eventually could go on to form colon cancer. Giving dietary fiber supplements may help prevent precancerous polyps from ever developing.

Who can join: Review the eligibility criteria below.

Location: OHSU Knight Cancer Institute โ€” Portland, Oregon

Age range: 18 Years

๐Ÿงช Interventions in This Study

๐Ÿ“‹ "Do I Qualify?" โ€” 1-Minute Self Screener

Instant Checklist

Full eligibility criteria are available on the official NIH protocol. View the criteria โ†—

๐Ÿ“ All Participating Trial Locations (1 Sites)

  • OHSU Knight Cancer Institute โ€” Portland, Oregon

๐Ÿ“ž Contact the Study Coordinator

Phone: (503) 494-8652

Email: rahmasha@ohsu.edu

Coordinator details come directly from the registered NIH protocol. Confirm the study is still recruiting before traveling.

๐Ÿ’ฐ Cost, Insurance & Patient Rights

  • 100% Free Items: The investigational treatment and protocol-required procedures are supplied at zero cost by the sponsor.
  • Routine Patient Care: Under federal law (ACA ยง 2709) and many state statutes, routine care costs are covered during participation.
  • Voluntary Participation: You may withdraw at any time without affecting your standard medical care.

๐Ÿ’ก How to Participate

  1. Check the checklist above to see if you may qualify.
  2. Contact the study coordinator using the phone/email above.
  3. Ask about the visit schedule, what is covered at no cost, and any travel support.
  4. Confirm with your own doctor before making a decision.
๐Ÿ›๏ธ View Official NIH Record โ†—