Pilot study on the effect of reducing dietary FODMAP intake on bowel function in patients without a colon.

Background: Poorly absorbed short-chain carbohydrates (FODMAPs) in the diet should, by virtue of their osmotic effects, increase fecal output following colectomy and ileal pouch formation or ileorectal anastomosis (IRA). The aim was to perform a proof-of-concept evaluation of this hypothesis.

Methods: Fifteen patients (13 pouch, 2 IRA) had dietary and symptomatic evaluation before and during a low FODMAP diet.