The 8x5 Diet for Bile Acid Diarrhoea: A Feasibility Randomised Controlled Trial

Exclusion Criteria

• •Unable to provide self-reported written confirmation that their diagnosis of bile acid diarrhoea was by SeHCAT testing
• •Pregnant/breastfeeding/planning a pregnancy in the next six months
• •Inflammatory bowel disease, previous or current microscopic colitis, or other serious morbidities such as liver disease, pancreatic disease, AIDS/HIV, radiotherapy for cancer, assessed at screening via patient self-report
• •Diarrhoea that is inadequately active: \<3 stools per day or \<1 watery stool (Bristol Stool Form types 6-7) per day as the mean of one week
• •Currently participating in another research study or has taken part in the previous 3 months
• •If taking insulin, metformin (other than slow-release), anti-obesity medication, or using commercially available formulated supplements to replace meals in previous three months
• •Use of antibiotics in the previous four weeks
• •Medically necessary dietary exclusions or issues deemed incompatible with the trial:
• •Food allergies, other than oral allergy syndrome/pollen-food syndrome
• •Exclusion of gluten (i.e. coeliac disease), lactose, biogenic amines, or any other dietary exclusion assessed as unsuitable as screening by the trial team. This includes if the participant knows they would refuse to eat: starchy foods, fruit and vegetables, protein-rich foods, or dairy and alternatives (e.g. following a ketogenic diet)
• •An eating disorder or disordered eating which is active or in the last 12 months
• •Alcohol or drug abuse, or self-harm, or depression, or suicide ideation in the last 12 months
• •Shift worker
• •If unwilling to keep a weighed 7-day food diary