IBS is diagnosed from a recurring pattern of belly pain and stool changes, the stool type sorts it into IBS-C, IBS-D or mixed, and common Indian foods such as rajma, onion and wheat are frequent triggers for some people.
What IBS is
Irritable bowel syndrome (IBS) is a functional bowel disorder. The gut moves, senses and reacts differently than usual, but routine tests usually show no visible damage or inflammation. That is why IBS is a diagnosis made from your symptoms, and why a doctor often checks for other causes first.
IBS is not the same as inflammatory bowel disease (Crohn's disease and ulcerative colitis) or coeliac disease. Those conditions can cause lasting damage and need their own tests. The symptoms overlap, which is one reason to get a proper assessment rather than guessing.
Do I have IBS? The Rome IV criteria in plain words
Doctors commonly use the Rome IV criteria, a set of symptom rules for functional bowel disorders published in 2016.1 In plain words, IBS is likely when:
- You have belly pain on average at least one day a week over the last three months.
- At least two of these bowel features are present: the pain is related to bowel movements (for example, easing after you go), you pass stool more or less often than usual, or the stool looks different.
- The pattern has been present for at least six months, which is the research version of the rule.
Bloating and gas are very common in IBS, but the criteria are built around pain and bowel changes. The rules are a guide for a clinician, not a checklist you can complete alone. Clinicians can apply the timing more flexibly once other causes have been ruled out. A doctor will usually ask about your history and may order blood or stool tests.
Products that fit this guide
Two Stack products that match the probiotic and soluble fibre sections below. Neither is presented as an IBS treatment.
IBS-C, IBS-D and mixed: the stool pattern sorts the subtype
The subtype depends on the stool form, using the Bristol stool chart. Types 1 and 2 are hard or lumpy, and types 6 and 7 are loose or watery. Under Rome IV, IBS-C means hard or lumpy stools in at least a quarter of movements and loose stools in less than a quarter. IBS-D is the reverse, and mixed IBS (IBS-M) means both patterns occur in at least a quarter of movements.
| Subtype | Stool pattern | What it often feels like |
|---|---|---|
| IBS-C (constipation) | Hard or lumpy in 25% or more of movements; loose in under 25% | Straining, feeling of incomplete emptying, fewer movements |
| IBS-D (diarrhoea) | Loose or watery in 25% or more of movements; hard in under 25% | Urgency, frequent loose stools, cramping before going |
| IBS-M (mixed) | Both hard and loose stools in 25% or more of movements | Swings between constipation and loose stools |
The subtype helps you read your own pattern. Constipation-led symptoms are often linked with low fluid intake and little daily movement, while loose-stool patterns are commonly reported after large meals, fatty food, caffeine and alcohol. Mixed patterns need the diary to show which pattern follows which meal.
Symptoms that need a doctor
Most people with IBS have symptoms without any warning signs. Some symptoms mean the cause should be checked first, before you assume IBS or start cutting foods. See a doctor promptly if you have:
- Blood in the stool, or black, tarry stools
- Unplanned weight loss
- Symptoms that wake you up at night
- New or changing symptoms after age 50
- Persistent diarrhoea, repeated vomiting or fever
- Tiredness with pale skin, or a family history of bowel cancer, coeliac disease or inflammatory bowel disease
These signs do not confirm a serious condition. They are the reason to book an assessment now instead of starting a food trial on your own.
Common food triggers in an Indian diet
Triggers differ from person to person. The most useful approach is to notice which meals come before a bad day, then test one food at a time rather than cutting many at once. These are the foods that come up most often in Indian cooking.
| Food | Why it can be a trigger | What to try |
|---|---|---|
| Rajma (kidney beans) | High in GOS and fructans, which gut bacteria ferment and turn into gas | Soak and rinse well, then test a smaller portion |
| Chole (chickpeas) | Chickpeas also contain GOS, a common cause of bloating | Reduce the portion for two weeks and compare |
| Onion and garlic | Fructans, a type of carbohydrate many people digest poorly | Use onion- or garlic-infused oil for flavour |
| Wheat (roti, maida, bread, biscuits) | Contains fructans | Swap to rice-based meals during a short trial |
| Milk | Lactose, which many adults digest poorly | Test lactose-free milk; curd is often tolerated better, though not by everyone |
| Spicy food | Chilli is not a FODMAP, but it is a common self-reported trigger for pain and urgency | Lower the heat for two weeks and note the change |
Fried snacks and ghee-heavy meals such as puris, samosas and rich gravies are a frequent complaint for loose stools. A typical dal, roti and onion tadka meal can contain several triggers at once, which is why changing one item at a time gives a clearer answer. For the full list of high- and low-FODMAP foods, read FODMAPs explained: understanding food sensitivities.
Low-FODMAP as a short elimination trial
FODMAPs are fermentable carbohydrates, including fructans, GOS, lactose, fructose and polyols. A low-FODMAP diet removes the high-FODMAP foods for a short period, then adds them back in groups to find the ones that bother you.
The strongest trial evidence comes from a structured version of the diet. In a 2014 crossover trial published in Gastroenterology, Halmos and colleagues had 30 people with IBS follow a low-FODMAP diet and a typical Australian diet, 21 days on each, with almost all food provided.2 Overall symptom scores were lower on the low-FODMAP diet, and bloating, pain and wind also improved.
A practical version looks like this:
- Keep a food and symptom diary for one week before you start.
- Cut the high-FODMAP foods from the list above for about three weeks. A dietitian's support makes this safer and easier.
- Reintroduce one group at a time, every few days, and note which ones bring symptoms back.
- Keep only the restrictions you need. Long-term avoidance without reintroduction can leave your diet short of fibre and variety.
Stress and the gut-brain link
The gut and the brain are in constant two-way contact. Stress can change how quickly the gut moves and how sensitive it feels to normal gas and stretching, which is one reason symptoms often flare in busy or anxious weeks. Stress does not cause IBS on its own, and some people with IBS cannot point to a clear stress trigger.
Watch for the pattern. If flare-ups follow exams, deadlines or poor sleep, write that in the diary next to your meals. Regular meals, enough sleep and daily walking are ordinary habits that suit most people. To see how gut discomfort can spill into mood and concentration, read how bloating can affect mood and focus.
Where probiotics and soluble fibre have evidence
Two supplement types have research behind them in IBS, but the strength of that evidence differs.
Soluble fibre has the clearer trial support
A 2014 systematic review and meta-analysis pooled 14 randomised trials with 906 people with IBS. Fibre supplements were associated with a lower chance of still having symptoms after treatment, and the benefit appeared only with soluble fibre. Bran showed no benefit.3 Soluble fibres dissolve in water to form a gel-like texture in the gut.
Daily Fibre Bomb: with Prebiotic blends several prebiotic fibres, including partially hydrolysed guar gum (PHGG), which is a soluble fibre. Each 3 g scoop provides 2.2 g of dietary fibre and is mixed with 150 to 200 ml of water. It also contains inulin and GOS, which are FODMAPs, so it does not suit the strict elimination phase described above. Start with a small amount and watch your stools for a week or two.
Probiotic evidence depends on the strain
A 2018 systematic review and meta-analysis of 53 randomised trials, with 5,545 patients, found that particular species and strains appeared to help overall IBS symptoms and abdominal pain. The authors concluded that it was not possible to draw definitive conclusions about which strains work.4 Adverse events were not more common with probiotics in those trials.
Daily Gut Balance: With Probiotic is a single-strain capsule with 1 billion CFU of Lactobacillus acidophilus NCFM and 200 mg of PHGG per serve, taken once a day with or without food. The strain name on a label tells you what is inside, not whether it will help your symptoms. Product guidance suggests consistent use over several weeks before judging the result. To compare strains, see key probiotic strains and their benefits.
What to eat day to day
Build most meals around foods that are less likely to trigger symptoms for most people. Rice, eggs, fish or chicken, carrots, cucumber and spinach are common choices in low-FODMAP eating. If milk is a trigger, lactose-free versions give you the same calcium without the lactose.
Eat regular meals rather than one large dinner, drink enough water, and add fibre gradually. A sudden jump in fibre can increase gas in some people.
Frequently Asked Questions
Can I diagnose IBS myself?
No. The Rome IV criteria are a guide for a clinician. Symptom patterns can look similar to other conditions, so a doctor should assess you, especially if any red-flag symptoms are present.
Is IBS the same as inflammatory bowel disease?
No. IBS is a functional disorder without visible inflammation on routine tests. Crohn's disease and ulcerative colitis are inflammatory conditions that need separate diagnosis and care.
Do I need to cut out wheat and dairy completely?
Usually not. A short trial shows which foods bother you, and reintroduction shows which of them can stay in your diet. A dietitian can help you avoid unnecessary restriction.
Can probiotics treat IBS?
The evidence is mixed and depends on the strain, so probiotics should not be seen as a treatment. Supplements do not replace a diagnosis or the advice of a healthcare professional.
How long should a low-FODMAP trial last?
The trial in the research lasted 21 days. Most people do the restriction phase for about two to three weeks, then reintroduce foods. Staying on a restricted diet for longer should only happen under a dietitian's guidance.
Does stress cause IBS?
Stress is not the only cause, but it can make symptoms more noticeable and more frequent. Tracking stress alongside food in your diary often shows the pattern.
Is Daily Gut Balance safe to take every day?
The product is labelled for adults and is taken as one capsule daily. Speak to a qualified healthcare professional before starting it if you are pregnant, have a medical condition, or take medicines.
Should I start soluble fibre if my stools are loose?
Start with a small amount and watch your stools for a week or two. If loose stools increase or pain worsens, stop and speak to a doctor before trying again.
Disclaimer: This article is for general education and is not medical advice. It does not diagnose, treat, cure or prevent irritable bowel syndrome or any other condition. Speak to a qualified healthcare professional before starting a supplement, especially if you are pregnant, have a medical condition or take medicines.
References
- Mearin F, Lacy BE, Chang L, Chey WD, Lembo AJ, Simrén M, Spiller R. Bowel Disorders. Gastroenterology. 2016;150(6):1393-1407. PubMed 27144627
- Halmos EP, Power VA, Shepherd SJ, Gibson PR, Muir JG. A diet low in FODMAPs reduces symptoms of irritable bowel syndrome. Gastroenterology. 2014;146(1):67-75. PubMed 24076059
- Moayyedi P, Quigley EM, Lacy BE, Lembo AJ, Saito YA, Schiller LR, et al. The effect of fiber supplementation on irritable bowel syndrome: a systematic review and meta-analysis. American Journal of Gastroenterology. 2014;109(9):1367-1374. PubMed 25070054
- Ford AC, Harris LA, Lacy BE, Quigley EMM, Moayyedi P. Systematic review with meta-analysis: the efficacy of prebiotics, probiotics, synbiotics and antibiotics in irritable bowel syndrome. Alimentary Pharmacology & Therapeutics. 2018;48(10):1044-1060. PubMed 30294792
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