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A 2023 multidisciplinary guideline for people with IBS strongly supports dietary approaches, soluble fibre and psychologically directed therapies. Physical activity may also help, but the evidence is less certain: a 2022 systematic review of 11 randomised trials in 622 adults with IBS found possible symptom improvement, although the reviewers rated the certainty of this evidence as very low.
The most useful choice is not a universal “best” remedy. Match one structured option to your main symptoms, give it a defined trial and seek clinical assessment rather than self-managing if you have warning signs. This pathway is for people already assessed for IBS, or without symptoms needing prompt medical evaluation; it cannot diagnose persistent bowel symptoms at home.
Choose a first step and set a review date
| Option to start with | When it may be a sensible first choice | Set this review point |
|---|---|---|
| Simpler dietary changes | Start here if you want a manageable first step. Keep regular meals and test one symptom-led change at a time, rather than cutting out many foods at once. A 2023 multidisciplinary IBS guideline supports dietary approaches as part of non-drug IBS management. | Review after 4 weeks. This is a practical clinical timeframe, not a proven deadline from a trial. Track symptoms and what changed so you can decide whether the approach was worthwhile. |
| A gradual soluble-fibre trial | Add this to regular meals and symptom-led dietary changes when constipation or a low-fibre diet is a prominent issue. The same 2023 IBS guideline strongly supports soluble fibre. | Review after 4 weeks. Increase gradually rather than changing several dietary factors at the same time. |
| A structured low-FODMAP trial | Consider this as a next dietary step when simpler changes have not been enough. A 2022 network meta-analysis of 13 randomised trials involving 944 people with IBS found that a low-FODMAP diet improved global IBS symptoms more often than habitual diet. | Assess the restriction phase over 2 to 6 weeks, then begin reintroduction. This short restriction-and-reintroduction approach reflects common clinical practice. |
| Gut-directed psychological therapy | Consider a clinician-delivered approach when IBS remains disruptive or symptoms and stress seem closely linked. Psychologically directed therapies are supported in the 2023 IBS guideline. | Review progress after 6 to 12 sessions, or roughly 8 to 12 weeks; these are common clinical review points. |
| Regular physical activity | Use this as supportive care alongside other steps, rather than as a replacement for them. | Give it about 8 weeks before judging its effect. IBS activity trials evaluated programmes over weeks, not days; this review point is practical clinical advice. |
Diet changes: when to use fibre or low FODMAP
Diet changes are best tested one at a time. That makes it easier to tell whether a change is useful, tolerable and realistic to continue. The table below focuses on two commonly used options: soluble fibre and a structured low-FODMAP approach.
| Approach | What it involves in practice | When it may fit IBS symptoms | How to judge it |
|---|---|---|---|
| Soluble fibre | Choose fibre that dissolves in water, rather than abruptly adding large amounts of high-fibre foods. Common clinical practice is to increase soluble fibre by about 3 to 5 g at a time each week, aiming for roughly 10 g a day if tolerated; reduce the amount if symptoms clearly worsen. | This is most relevant when constipation, hard stools or a low-fibre diet is a prominent issue. A 2023 multidisciplinary guideline for people with IBS strongly supports soluble fibre as part of management. | Increasing fibre quickly can cause gas, bloating or discomfort for some people. Keep other major food changes stable while testing it, and review whether stool frequency, stool consistency, pain or bloating have changed after four weeks. |
| Low-FODMAP diet | This temporarily reduces foods high in fermentable carbohydrates known as FODMAPs, then systematically reintroduces them to identify personal triggers and create the least restrictive diet possible. It is not intended to be a lifelong exclusion diet. | It is a reasonable next dietary option when bloating, abdominal pain or food-related symptoms continue despite simpler changes. In a 2025 network meta-analysis of 28 randomised trials involving 2,338 people with IBS, a low-FODMAP diet was associated with fewer people failing to improve in global IBS symptoms than a habitual diet. | Use the restriction phase only briefly, then move to reintroduction rather than continuing broad avoidance. Restrictive eating, unintentional weight loss, pregnancy, a current or previous eating disorder, or complex nutritional needs are reasons to involve a dietitian or clinician before attempting it. |
| A food-and-symptom record | For the dietary change you choose, record meals alongside pain, bloating, stool frequency and stool consistency. Keep notes simple enough to complete most days. | This can help distinguish a repeatable pattern from a one-off bad day. It is particularly useful during fibre changes or FODMAP reintroduction, when the aim is to identify what you tolerate rather than to avoid foods indefinitely. | Look for a meaningful pattern over several weeks, not a reaction after one meal. A record cannot prove that a food caused symptoms, but it can give useful information for a clinician or dietitian. |
Gut-directed therapy: an option for persistent IBS
IBS involves communication between the gut and brain, so psychological therapy is not based on the idea that symptoms are “all in your head”. Gut-directed care aims to change the unhelpful cycle that can develop between bowel symptoms, attention to sensations, stress responses, everyday behaviour and the gut-brain axis.
Options include cognitive behavioural therapy (CBT) and gut-directed hypnotherapy. CBT may include noticing and testing thoughts or habits that can make symptoms feel harder to manage, and developing practical responses to pain, bowel urgency, food-related worry or avoidance. Gut-directed hypnotherapy uses focused relaxation and therapeutic suggestions centred on digestive symptoms and gut sensations.
These approaches are most worth considering when IBS remains disruptive despite dietary changes, when stress and symptoms appear closely linked, or when concern about symptoms is limiting work, social activities, travel or eating. A 2023 multidisciplinary guideline for people with IBS strongly supports psychologically directed therapies as part of IBS management.
The aim does not need to be the complete disappearance of every bowel symptom. A useful treatment goal may be fewer symptoms, symptoms that feel less disruptive, or greater confidence in day-to-day activities. This can make gut-directed therapy relevant even for someone whose symptoms have not responded fully to food changes.
Making the option practical
Look for a clinician or therapist who has experience delivering CBT or hypnotherapy for IBS or other disorders of gut-brain interaction. A GP, gastroenterology service or dietitian may be able to suggest local services, although referral routes differ.
Feasibility matters. Cost, waiting times, appointment time and the availability of suitably trained therapists may limit access, and not everyone benefits to the same extent. If in-person treatment is impractical, ask whether an appropriate remote programme or therapist-led online option is available. The key decision is whether the approach feels manageable enough to try consistently, alongside rather than instead of appropriate medical care.
Physical activity: useful support, not a proven prescription
Physical activity can be a sensible supportive step for many people with IBS, particularly when it is enjoyable and fits everyday life. It should not be treated as a replacement for dietary changes, gut-directed therapy or clinical review when those are needed.
- Expect a possible benefit, not a guaranteed result. The 2022 systematic review of IBS randomised trials found that physical-activity programmes may improve reported IBS symptoms compared with usual care. However, the evidence was rated very uncertain: studies were small, results varied, and trials had unclear or high risk of bias. The research cannot identify the best activity, dose or intensity for IBS.
- Choose a moderate activity you can repeat. Walking, cycling and yoga are practical ways to build regular movement. Start below the level that feels likely to aggravate symptoms—for example, a short walk on most days—and increase duration or pace gradually if it feels comfortable.
- Use 150 minutes a week as a flexible target. For adults who can exercise safely, gradually building towards 150 minutes of moderate activity per week offers a concrete starting point from general physical-activity guidance, rather than an IBS-specific trial prescription. This could mean five 30-minute sessions, or shorter bouts spread across the week. The aim is regularity, not pushing through pain, urgency or exhaustion.
- Track whether it helps your own symptoms. Note activity alongside abdominal pain, bloating, urgency and bowel habit for around eight weeks. Look for an overall pattern, such as better symptom control or greater confidence doing daily activities, rather than expecting a clear response after each session. If it is not helpful, that does not mean you have failed; activity may still support general health while another IBS approach addresses symptoms more directly.
- Adjust if exercise itself provokes gut symptoms. Long or high-intensity activity can trigger diarrhoea, abdominal pain or nausea in some people; a 2025 systematic review of 231 studies of exercise-related gastrointestinal symptoms across varied populations reported these effects, so this is not IBS-specific evidence. Lower the intensity, shorten sessions or change the timing around meals, and discuss persistent exercise-related symptoms with a clinician.
What the research still cannot answer
Research can estimate what tends to happen across groups of people with IBS, but it cannot reliably identify the best option for one person. IBS symptoms vary over time, and people differ in bowel pattern, food tolerance, stress, daily routine and what they can realistically maintain. A helpful result in a study is therefore a reason to consider a structured trial, not a prediction that the same approach will work for you.
The low-FODMAP research is a good example of this limit. Although the same 2022 network meta-analysis mainly assessed the initial restriction phase, reintroduction and personalisation are important for finding the broadest diet a person can tolerate. The review tells us less about those longer-term stages.
How to use uncertainty well
Evidence gaps do not mean that fibre, a low-FODMAP approach, gut-directed therapy or activity cannot help an individual. They do mean it is sensible to set a clear goal, change one main factor at a time and review the overall pattern rather than interpreting one good or bad day as proof.
A worthwhile approach is one that produces a meaningful improvement for you and remains safe and manageable. If the expected review period passes without benefit, or the plan becomes overly restrictive or stressful, use that information to discuss the next option with a clinician or dietitian. No non-drug approach can be promised to cure IBS.
When to see a clinician instead of self-managing
- Get prompt medical advice for warning signs. Blood in the stool, black stools, unintentional weight loss, anaemia, fever, persistent vomiting, severe or worsening abdominal pain, or a substantial new change in bowel habit should not be managed through repeated diet or lifestyle experiments. These symptoms do not necessarily mean a serious condition, but they need assessment.
- Arrange a review if symptoms have not been diagnosed as IBS. IBS is diagnosed positively from the symptom pattern, while also checking for alarm symptoms and selecting appropriate tests where needed. The 2023 multidisciplinary IBS guideline supports this approach rather than assuming persistent bowel symptoms are IBS without assessment. A clinician can help distinguish IBS from conditions that may need different testing or treatment, including coeliac disease and inflammatory bowel disease.
- Expect further investigation when alarm features are present. The same 2023 IBS guideline recommends colonoscopy for people with alarm features. The appropriate tests depend on the symptom pattern, age, medical history and examination findings, so colonoscopy is not automatically needed for every person with suspected IBS.
- Review a structured self-management trial rather than continuing indefinitely. If simpler dietary changes, soluble fibre or regular activity have not helped after 4 to 8 weeks, arrange a clinical review. This is common clinical practice: the next decision is to reassess whether the diagnosis still fits, clarify the main symptom pattern and discuss a different or combined treatment plan. Take your food-and-symptom record, including what you tried, how consistently you followed it and any unwanted effects.
- Seek help earlier if the plan is becoming unsafe or unmanageable. Contact a clinician or dietitian if dietary restriction is causing weight loss, nutritional concerns, marked anxiety around food or difficulty eating enough. This is particularly important before trying broad elimination diets when pregnancy, a current or past eating disorder, or other complex nutritional needs are relevant.
Sources
- Italian guidelines for the management of irritable bowel syndrome: Joint Consensus from the Italian Societies of: Gastroenterology and Endoscopy (SIGE), Neurogastroenterology and Motility (SINGEM), Hospital Gastroenterologists and Endoscopists (AIGO), Digestive Endoscopy (SIED), General Medicine (SIMG), Gastroenterology, Hepatology and Pediatric Nutrition (SIGENP) and Pediatrics (SIP)
- Physical activity for treatment of irritable bowel syndrome
- Efficacy of a low FODMAP diet in irritable bowel syndrome: systematic review and network meta-analysis
- Efficacy of dietary interventions in irritable bowel syndrome: a systematic review and network meta-analysis
- Exploring the gut-exercise link: A systematic review of gastrointestinal disorders in physical activity
