Long-term personalized low FODMAP diet in IBS

Neurogastroenterol Motil. 2022 Apr;34(4):e14356. doi: 10.1111/nmo.14356. Epub 2022 Mar 16.


Irritable bowel syndrome (IBS) patients often resort to dietary interventions to manage their symptoms, as these are frequently exacerbated by various food items. A diet low in fermentable oligosaccharides, disaccharides, monosaccharides, and polyols (FODMAPs) is now considered by many a first-line treatment option for IBS, as it has been found to be superior to alternative dietary interventions. However, concerns have been raised as restricting fermentable carbohydrates might result in nutritional deficits or alter composition and function of the gut microbiome in the long term. The study by Staudacher et al., published in this issue of the journal, is the first prospective study to follow IBS patients after completing all three phases of the low FODMAPs diet (restriction, reintroduction, and personalization), demonstrating that this is safe and effective in long-term, when patients are supervised by a dietician. This mini-review provides an up-to-date overview of the use of fermentable carbohydrate's restrictions for symptom management in IBS patients, while summarizing the current knowledge on the possible mechanisms of action behind low fermentable carbohydrate diet efficacy.

Keywords: FODMAPs; Irritable bowel syndrome; SCFAs; bifidobacteria; diet; microbiome.

Publication types

  • Review

MeSH terms

  • Carbohydrates
  • Diet
  • Diet, Carbohydrate-Restricted / adverse effects
  • Disaccharides / adverse effects
  • Fermentation
  • Humans
  • Irritable Bowel Syndrome*
  • Monosaccharides / adverse effects
  • Oligosaccharides
  • Prospective Studies


  • Carbohydrates
  • Disaccharides
  • Monosaccharides
  • Oligosaccharides