Clinical Research Directory

Inclusion Criteria: * Age ≥18 years; * Being diagnosed with CRC and planned to undergo elective CRC resection; Exclusion Criteria: * Previously have had a large abdominal resection, excluding appendectomy and cholecystectomy; * Diagnosed with Crohn's disease, Ulcerative Colitis, Celiac Disease; * Currently having a stoma; * Known allergic reactions to plants from the Asteraceae (Compositae) family (e.g., lettuce, daisies, sunflowers, artichokes, sage, tarragon, chamomile, chicory etc.); * Currently following a strict diet and unwilling or unable to change (e.g., gluten free or ketogenic diet); * Currently using fiber supplements, prebiotics and/or probiotics and unwilling to stop using these for the duration of the intervention; * Having a habitual dietary fiber intake \>30 g/day for women and \>40 g/day for men, measured with a food frequency questionnaire; * Dementia or other cognitive disabilities that makes it impossible to fill out questionnaires correctly; * Illiteracy (inability to read and understand Dutch).