# Eating with IBS

IBS is a common condition that affects the digestive system. The NHS and the British Dietetic Association both say there is no single diet for it, and they set out what people find useful.

## What IBS is

The NHS describes IBS as a common condition that affects the digestive system, which can cause stomach cramps, bloating and diarrhoea. They say it is usually a lifelong condition, but that lifestyle changes and medicine can help. The main symptoms they list are stomach pain or cramps, bloating, diarrhoea and constipation, and they note there are days when symptoms are better and days when they are worse.

The British Dietetic Association say IBS is a medical term for a collection of gut symptoms, that food can have an impact on symptoms, and that symptoms vary from one person to another. Their fact sheet notes that an assessment should be considered if you have had abdominal pain or discomfort, bloating, or a change in bowel habit for at least six months, and that other conditions such as coeliac disease should be ruled out.

The NHS says to see a GP if you think you might have IBS and have had symptoms for over four weeks, and to ask for an urgent appointment if you have lost a lot of weight for no reason or are bleeding.

## Regular meals and enough fluid

The NHS advice for IBS includes trying to eat a healthy, balanced diet, keeping a diary of what you eat and the symptoms you get, and trying to drink at least eight to ten drinks of fluid a day, around 1.5 litres, such as water or non-caffeinated drinks. Their list of things not to do includes delaying or skipping meals, eating too quickly, and eating lots of fatty, spicy or processed foods.

The British Dietetic Association say to try to eat three regular meals a day, to try not to skip any meals or to eat late at night, and that smaller meal sizes may ease symptoms. They also suggest limiting caffeine, reducing fizzy drinks and cutting down on rich or fried foods.

Three regular meals does not have to mean three sit down meals. For some people it is breakfast, something at midday and dinner. For others it is a pattern that moves around, and what matters is that there is usually something in the day rather than nothing until evening.

## Fibre and the foods people cut back on

The NHS suggests eating oats, such as porridge, regularly and up to one tablespoon of linseeds a day, and avoiding foods that are hard to digest, such as cabbage, broccoli, cauliflower, brussels sprouts, beans and onions, and products with the sweetener sorbitol. For diarrhoea they suggest cutting down on high fibre foods like brown bread and brown rice, and for constipation increasing soluble fibre, with oats, pulses, carrots, peeled potatoes and linseeds among the foods they name.

The British Dietetic Association add that fibre should be increased gradually, because a sudden increase can make symptoms worse, and they suggest avoiding extra wheat bran. For bloating and wind they suggest limiting gas producing foods such as beans and pulses, brussels sprouts and cauliflower.

Fibre is not one thing. Soluble fibre such as oats behaves differently from insoluble bran, and the British Dietetic Association say that how much fibre you need may differ if you have IBS, diabetes, high cholesterol or constipation, which is a good moment to ask a GP for a referral to a dietitian.

## One change at a time

The advice from both organisations converges on the same method. Keep a food and symptom diary while you are making changes, so you can see what has helped, and change one thing at a time so that you know what made the difference. The NHS also says to find ways to relax and to get plenty of exercise.

A shopping list helps with that method. One list built from your meal plan, grouped by aisle and scaled to the servings you need, means the same ingredients come up week after week, so you can see whether a change you made is the reason a week felt different.

The NHS says to see a GP if diet changes and pharmacy medicines are not helping, or if you need to avoid lots of different foods to control symptoms, and says they may refer you to a dietitian or a specialist. Nomeriu is not medical advice and cannot tell you which foods suit your gut. Talk to your GP or a dietitian about your own situation.

Sources

- [NHS: Diet, lifestyle and medicines for IBS](https://www.nhs.uk/conditions/irritable-bowel-syndrome-ibs/diet-lifestyle-and-medicines/) (The do and do not list, the fluid advice, oats, linseeds, sorbitol and when to see a GP.)
- [NHS: Symptoms of IBS](https://www.nhs.uk/conditions/irritable-bowel-syndrome-ibs/symptoms/) (The main symptoms, possible triggers and the advice to seek urgent help for certain signs.)
- [BDA: Irritable bowel syndrome (IBS) and diet](https://www.bda.uk.com/resource/irritable-bowel-syndrome-diet.html) (Three regular meals, not skipping meals, gradual increases in fibre, the food and symptom diary and one change at a time.)

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Source: https://nomeriu.com/guides/eating-with-ibs
Last updated: 2026-10-21