Mechanism of FODMAP Restriction on FGID Patients

High FODMAP foods are swapped for low FODMAP alternatives, for two weeks (Elimination phase)

Key High FODMAP foods will be identified from patients' food diaries and swapped with low FODMAP alternatives. (Elimination phase)

Subjects are required to follow a set of healthy eating guidelines set by NICE guidelines for IBS for two weeks a. Have regular meals and take time to eat b. Avoid missing meals or leaving long gaps between eating c. Drink at least eight cups of fluid a day, especially water or other non-d. caffeinated drinks, such as herbal teas d. Restrict tea and coffee to three cups a day e. Reduce intake of alcohol and fizzy drinks . Limit intake of high-fibre food g. Reduce intake of resistant starch h. Limit fresh fruit to three portions a day