FODMAPs are certain short-chain carbohydrates that may be poorly absorbed in the small intestine. They can draw water into the bowel, and gut bacteria ferment them to produce gas. Water and gas can stretch the bowel.
These are normal processes in people with and without IBS. The amounts vary. Some people with IBS experience visceral hypersensitivity: ordinary stretching can feel uncomfortable or painful. Food, gut sensitivity and other factors can all contribute to bloating and symptoms.
Choosing a lower-FODMAP portion can reduce the carbohydrates available to draw in water and ferment. The aim is to reduce FODMAP exposure, rather than simply eat less food. This concerns water in the bowel, rather than general fluid retention.
Read Monash University’s explanation of FODMAPs and symptoms ↗
A starting point, followed by more variety.
Monash University developed the low FODMAP diet. It includes restriction, reintroduction and personalisation. A dietitian can help you work towards the broadest diet you tolerate. This finder helps with shopping; it does not replace those steps.
Explore the three-step approach at Monash ↗