NCT06212817

Dietary Fiber Before Colorectal Cancer Surgery

FiberUP in Clinical Practice: Increasing Preoperative Dietary Fiber Intake in Colorectal Cancer Patients.

• Status: Recruiting
• Phase: N/A
• Study type: Interventional
• Enrollment: 54 (estimated)
• Sponsor: Wageningen University · Academic / Other
• Sex: All
• Age: 18 Years
• Healthy volunteers: Not accepted

Summary

The aim of this randomized controlled trial is to investigate the feasibility of increasing preoperative dietary fiber intake in individuals with colorectal cancer who will undergo surgery. This will be done using 1) digital personalized dietary advice or 2) a dried vegetable product compared to 3) habitual diet (control).

Detailed description

Rationale: Postoperative complications, affecting up to 50% of the patients with colorectal cancer (CRC) undergoing surgery, are associated with impaired quality of life and higher mortality rates. The investigators have previously shown an association between a higher preoperative dietary fiber intake and a lower risk of postoperative complications. Before large interventions aiming to evaluate potential causal relationships between dietary fiber and postoperative complications can be implemented, feasibility of increasing dietary fiber intake before CRC surgery needs to be explored. Objective: To investigate the feasibility of increasing preoperative dietary fiber intake in CRC patients undergoing surgery via 1) personalized dietary advice (Vezel-UP tool), or 2) vegetable product containing natural fibers compared to 3) habitual diet (control group). Secondary objectives will be considered to generate preliminary (biological) data to support the design of a future large-scale intervention studies. Study design: A randomized controlled trial with three groups: 1) Vezel-UP group, 2) vegetable product group, and 3) control group. The intervention period equals the time between diagnosis and surgery, which is on average \~4 weeks but will vary between individual patients depending on their characteristics (e.g., physical condition and tumor location) and waiting list. Study population: 54 CRC patients who will undergo elective tumor resection. Main study parameters/endpoints: The primary outcome is the change in dietary fiber intake, which is assessed via two 24hr dietary recalls at baseline and during and after the intervention. Secondary parameters are stool pattern, gastrointestinal symptoms, quality of life, fecal microbiota composition, fecal and plasma microbial metabolites levels (i.e., SCFA and indoles), and length of hospital stay.

Conditions

• Colorectal Cancer

Interventions

Type	Name	Description
OTHER	Dietary intervention	Increase dietary fiber intake

Timeline

• Start date: 2024-04-29
• Primary completion: 2026-01-01
• Completion: 2026-05-01
• First posted: 2024-01-19
• Last updated: 2025-11-18

Locations

3 sites across 1 country: Netherlands