High-Fiber diet may cut Early-Onset bowel cancer risk

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion * If female, not pregnant, lactating, or planning a pregnancy within the next 4 months. * Living in the United Kingdom. Exclusion * Dietary fibre intake \<16 g/day or \>30 g/day. * Unwilling to comply with the intervention (wholegrains, beans and pulses, and nuts and seeds). * Are diagnosed with the following food allergies: gluten, peanuts, or nuts. * Are living or have a past medical history of an eating disorder. * Alcohol Use Disorders Identification Test - Consumption score \> 10 points. * Have lost significant weight (\>10% of original bodyweight) over the past 3 months. * Use of any of the following drugs within the last month: (i) antifungals, antivirals, or antiparasitic medications (ii) methotrexate or immunosuppressive agents. * Use of systemic antibiotics within the last 3 months. * Use of commercial probiotics, prebiotics, laxatives, or other gut health supplements within the last month. * Using Glucagon-Like Peptide-1 Receptor Agonists. * Acute disease at the time of enrolment. Acute disease is defined as the presence of a moderate or severe illness with or without fever. * Undergoing dietetic care for chronic conditions. * History of cancer, except for squamous or basal cell carcinomas of the skin that have been medically managed by local excision. * Any confirmed or suspected condition/state of immunosuppression or immunodeficiency (primary or acquired), including human immunodeficiency virus infection. * Major surgery of the GI tract, except for cholecystectomy and appendectomy, in the past five years. Any major bowel resection at any time. * Any other condition declared by the participant deemed by the medical supervisor to affect the normal conduct of the study and analysis of results. * History of active, uncontrolled gastrointestinal disorders or diseases, including: (i) Coeliac disease (ii) inflammatory bowel disease, including ulcerative colitis, Crohn's disease, or indeterminate colitis (iii) persistent, infectious gastroenteritis, colitis or gastritis (iv) persistent or chronic diarrhoea of unknown aetiology (v) chronic constipation (vi) Irritable Bowel Syndrome (vii) Clostridium difficile infection (recurrent) (viii) Helicobacter pylori infection (untreated). * Any other condition declared by the participant deemed by the medical supervisor to affect the normal conduct of the study and analysis of results.