The aim was aimed to investigate if all carbohydrate groups eliminated in the Low FODMAP diet are equally important in relieving gastrointestinal symptoms in IBS.

in a randomized cross-over design to three different carbohydrate-modified diets: A) Low Polyol diet, B) Low FOS+GOS diet, and C) Low FODMAP diet for three months without wash-out-periods. Gastrointestinal symptoms, Quality of life was measured at baseline and after each intervention diet.

Low FODMAP diets contain 3 major types of carbohydrates to be avoided. The clasical diet is very difficult to maintain over longer periods of time. Therefore, we aimed to investigate if all carbohydrate groups in the Low FODMAP diet are equally important in relieving gastrointestinal symptoms in IBS.

Patients diagnosed with IBS according to the Rome III criteria were randomised in a cross-over design to three different carbohydrate-modified diets: A) Low Polyol diet, B) Low FOS+GOS diet, and C) Low FODMAP diet for a total of three months without wash-out-periods. Gastrointestinal symptoms were assessed by the Birmingham IBS questionnaire and adequate relief (IBS-AR). Quality of life was measured by the IBS Quality of Life Scale questionnaire (IBS-QOL). All registrations were performed at baseline and after each intervention diet.

Inclusion Criteria:

• IBS diagnosed by the Rome III criteria and
• referred to the clinic for treatment by diet

Exclusion Criteria:

• Dementia
• lack of ability to speak Danish
• additional chronic diseases prevailing participation