Exploring the link between fish intake and colorectal lesions

Dietary Factors Associated to Colorectal Premalignant Lesions (COLOMAR-1)

Observational Fundación Vithas · NCT06368661

This study looks at whether eating more fish can help prevent early signs of colorectal cancer in healthy people by checking their diets and gut health.

Quick facts

Study typeObservational
Enrollment30 (estimated)
Ages45 Years and up
SexAll
SponsorFundación Vithas Academic / other
Locations1 site (Vigo, Pontevedra)
Trial IDNCT06368661 on ClinicalTrials.gov

What this trial studies

This observational study investigates the correlation between fish protein consumption and dietary habits with the presence of colorectal premalignant lesions in healthy volunteers. It aims to assess gut microbial profiles associated with different dietary patterns to better understand the potential role of fish intake in cancer prevention. Participants will undergo colonoscopy, blood sampling, and dietary questionnaires to gather comprehensive data. The study serves as a preliminary proof-of-concept to evaluate the feasibility of a larger research program focused on colorectal cancer prevention.

Who should consider this trial

Good fit: Ideal candidates are healthy individuals aged 45 years or older who are willing to participate in the study.

Not a fit: Patients with a history of colorectal cancer, inflammatory bowel disease, or those who have had recent colonoscopies may not benefit from this study.

Why it matters

Potential benefit: If successful, this study could provide insights into dietary recommendations that may help prevent colorectal cancer.

How similar studies have performed: While there is limited evidence specifically linking fish intake to colorectal cancer prevention, other studies have explored dietary impacts on cancer risk with varying degrees of success.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

* 45 years old or more.
* Be willing to participate in the study.

Exclusion Criteria:

* Pregnancy
* Previous colorectal cancer.
* Familial colorectal cancer syndrome.
* Previous colonoscopy and colon polypectomy (last five years ).
* Inflammatory bowel disease.
* Medical contraindication for colonoscopy at investigator´s criteria.

Where this trial is running

Vigo, Pontevedra

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 Nutrition Related Neoplasm/CancerFishColon cancerRectal cancer
Last reviewed 2026-06-09 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.