The Eatwell Adapted Trial for Fibre Intervention in Bowel Cancer Risk Early-onset.
Overview
- Phase
- Not Applicable
- Status
- Not yet recruiting
- Sponsor
- King's College London
- Enrollment
- 200
- Locations
- 1
- Primary Endpoint
- Short Chain Fatty Acids
Overview
Brief Summary
The goal of this clinical trial is to understand whether diet can impact mechanisms linked to early-onset colorectal cancer.
The main question it aims to answer is: does a high-fibre modified EatWell diet improve stool, blood, urine, and saliva measures linked to early-onset colorectal cancer, compared to the standard EatWell diet?
Researchers will compare the standard EatWell diet (UK national healthy eating guidance providing 30g/day of dietary fibre) to a modified EatWell diet (UK national healthy eating guidance plus specific thresholds for fibre-rich food groups providing 40g/day of dietary fibre).
Participants will follow the dietary advice for 12 weeks, attend clinic visits at the start and end of the study for stool, blood, urine, and saliva sampling, body composition measures, health checks, and complete health, diet, and lifestyle questionnaires.
Detailed Description
BACKGROUND The incidence of early-onset colorectal cancer (EOCRC) is on the rise worldwide. Many EOCRC cases may be preventable through modifiable lifestyle factors, including diet . Colorectal cancer risk reductions have been reported with higher intakes of dietary fibre, and different food sources of fibre may confer varying levels of protection. Dietary recommendations for colorectal cancer prevention advise limiting the intake of red and processed meats and added sugars, while prioritising fibre-rich foods such as fruits, vegetables, and whole grains, aligning with the UK EatWell diet; however, its effects on mechanisms underlying EOCRC remain to be elucidated.
AIM To evaluate whether a modified high-fibre EatWell diet can more effectively modulate metabolomic, microbiome, and inflammatory markers associated with EOCRC compared to the standard EatWell diet.
PARTICIPANTS One hundred adult twin pairs (n=200), volunteers of TwinsUK, will be invited to participate. Interested individuals will complete a screening survey and a food frequency questionnaire to determine eligibility.
METHODS EAT-FIBRE is a single-centre parallel-arm randomised controlled diet intervention trial. Twin pairs will be split-randomised with allocation to either the control arm (standard EatWell diet) or intervention arm (modified EatWell diet) to adhere to for 12 weeks. Participants will attend the clinic for stool, blood, urine, and saliva sampling, body composition measures, health checks, and complete health, diet, and lifestyle questionnaires, and will return at the endpoint for repeat measures. The follow-up will be remote at 12 months, where participants will collect and post stool, blood, urine, and saliva samples, and repeat various questionnaires.
Study Design
- Study Type
- Interventional
- Allocation
- Randomized
- Intervention Model
- Parallel
- Primary Purpose
- Prevention
- Masking
- Single (Outcomes Assessor)
Eligibility Criteria
- Ages
- 18 Years to 50 Years (Adult)
- Sex
- All
- Accepts Healthy Volunteers
- Yes
Inclusion Criteria
- •If female, not pregnant, lactating, or planning a pregnancy within the next 4 months.
- •Living in the United Kingdom.
- •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.
Exclusion Criteria
- Not provided
Arms & Interventions
EatWell diet
Participants will be advised to follow the EatWell diet (UK national healthy eating guidance), providing 30g/day of dietary fibre.
Intervention: EatWell diet (Other)
Modified EatWell diet
Participants will be advised to follow the EatWell diet (UK national healthy eating guidance) with additional daily thresholds for fibre-rich food groups (wholegrain cereals, beans and pulses, and nuts and seeds), providing 40g/day of dietary fibre.
Intervention: Modified EatWell diet (Other)
Outcomes
Primary Outcomes
Short Chain Fatty Acids
Time Frame: 12 weeks; from baseline to endpoint.
Change from baseline in faecal butyrate.
Secondary Outcomes
- Microbially derived metabolites(12 weeks; from baseline to endpoint.)
- Gut microbiome composition(12 weeks; from baseline to endpoint.)
- Markers of systemic and intestinal inflammation(12 weeks; from baseline to endpoint.)