TL;DR: Key Takeaways for IBS Diet Success
- The best-studied IBS diet is the low-FODMAP diet — about three in four people with IBS improve on it, according to Monash University, which developed it.
- It has three steps: swap high-FODMAP foods for 2–6 weeks, test each FODMAP group back one at a time, then settle into a personal diet. It is not a lifelong ban.
- Indian food works well on it: rice, poha, millets, eggs, chicken, fish, most vegetables and most spices are low-FODMAP; the main things to change are onion, garlic, wheat, large portions of dal and rajma, and milk.
- Diet is personal: your triggers may be very different from someone else's, so keep a symptom diary.
- Get guidance if you're losing weight, cutting out many foods or have red-flag symptoms.
What Is the Best Diet for IBS?
There is no single diet that suits everyone with IBS, but the low-FODMAP diet has the strongest research behind it and is recommended in the ACG clinical guideline as a short-term elimination diet. Alongside it, some simple habits help almost everyone:
- Eat regular meals at similar times, and don't skip breakfast
- Eat slowly and keep dinner lighter and earlier
- Choose soluble fibre (isabgol, oats) over insoluble fibre such as wheat bran
- Limit fried food, very spicy food, caffeine, alcohol and fizzy drinks
- Drink enough water through the day
The Low-FODMAP Diet Explained Simply
What is the low-FODMAP diet? It is a short-term eating plan, developed by researchers at Monash University in Australia, that temporarily cuts down a group of fermentable carbohydrates called FODMAPs to calm IBS symptoms, then brings foods back one group at a time. In simple words: eat fewer of the foods that ferment and make gas for a few weeks, find out which ones really bother you, and keep eating everything else. In Indian diets, common FODMAP triggers include fructans from wheat, onion and garlic, lactose from milk, and GOS from pulses.
FODMAPs are short-chain carbohydrates — found in foods like wheat, onion, garlic, beans, milk, honey and some fruits — that the small intestine absorbs poorly. Gut bacteria ferment them in the large intestine, producing gas and drawing in water. In a sensitive IBS gut, that means bloating, cramps and changes in stool. For a full breakdown of the four FODMAP groups, see our guide to the worst foods for IBS.
The diet doesn't remove FODMAPs for ever. It lowers them for a short time, finds out which ones bother you, and brings back everything you tolerate.
The 3 Steps of the Low-FODMAP Diet
Step 1: Swap High-FODMAP Foods (2–6 weeks)
Replace high-FODMAP foods with low-FODMAP alternatives for 2 to 6 weeks, as Monash University advises. If your symptoms improve, move to Step 2. If they don't improve after six weeks, the diet may not be the answer for you — speak to your doctor rather than restricting further.
Step 2: Reintroduce One FODMAP Group at a Time
Keep your Step 1 diet as the base, then test one FODMAP group at a time by eating a food rich in only that group daily for 3 days while noting your symptoms. For example, test lactose with a glass of milk, or fructans with a wheat roti. Leave a few symptom-free days between tests.
Step 3: Build Your Personal Long-Term Diet
Bring back every food you tolerated, and limit only the groups — and portion sizes — that clearly trigger you. Most people end up eating a much wider diet than they feared.
Low-FODMAP Foods: What You Can Eat
| Food group | Low-FODMAP choices (normal portions) |
|---|---|
| Grains | Rice, poha, oats (about ½ cup), quinoa, millet, rice-flour roti or dosa, gluten-free bread, sourdough spelt |
| Vegetables | Potato, carrot, cucumber, tomato, spinach (palak), red capsicum, brinjal, zucchini, lauki, green beans, lettuce, ginger |
| Fruits | Firm banana, papaya, orange, kiwi, strawberries, blueberries, pineapple, grapes |
| Dairy and alternatives | Lactose-free milk and curd, hard cheeses such as cheddar, ghee and butter |
| Protein | Eggs, chicken, fish, mutton, firm tofu |
| Pulses (small portions) | Canned, rinsed chickpeas or lentils in small servings |
| Nuts and seeds | Peanuts, walnuts, pumpkin seeds, sesame, chia |
| Drinks | Water, peppermint or ginger tea, weak black tea, one cup of coffee |
| Flavour | Most whole spices, a pinch of hing (wheat-free), garlic-infused oil, green tops of spring onion, fresh herbs |
High-FODMAP Foods to Limit in Step 1
| Food group | High-FODMAP foods |
|---|---|
| Grains | Wheat roti, maida, bread, biscuits and pasta in large amounts; rye; barley |
| Vegetables | Onion, garlic, cauliflower, mushrooms, asparagus, the white part of spring onion |
| Fruits | Apple, pear, mango, watermelon, cherries, dried fruit, fruit juice |
| Dairy | Milk, milky chai, kheer, soft cheeses, ice cream |
| Pulses | Rajma, chole, and large bowls of dal |
| Sweeteners | Honey, high-fructose corn syrup, sorbitol, xylitol and "sugar-free" sweets |
| Nuts | Cashews, pistachios |
Portion size matters: many foods are fine in small amounts and trigger symptoms only in large servings.
7-Day Indian Low-FODMAP Meal Plan (Step 1)
Cook without onion and garlic; use garlic-infused oil, hing, ginger, jeera, curry leaves and tomato for flavour.
| Day | Breakfast | Lunch | Snack | Dinner |
|---|---|---|---|---|
| 1 | Poha with peanuts and curry leaves | Jeera rice, chicken or tofu curry (tomato-ginger base), cucumber salad | Firm banana | Grilled fish, boiled potato, sautéed green beans |
| 2 | Oats porridge with lactose-free milk and strawberries | Rice, palak sabzi, two-egg bhurji with tomato | Roasted peanuts (a small handful) | Rice-flour roti, lauki sabzi, lactose-free curd |
| 3 | Neer dosa (rice batter) with tomato chutney | Curd rice made with lactose-free curd, carrot and cucumber raita | Orange | Chicken or tofu stir-fry with capsicum and brinjal, rice |
| 4 | Two boiled eggs, rice-flour roti, tomato slices | Quinoa or rice pulao with carrots and green beans | Papaya | Fish curry (tomato base), rice, sautéed spinach |
| 5 | Poha with peanuts | Rice, tinda sabzi, a small serving of canned rinsed chickpeas | Kiwi | Millet roti, potato-capsicum sabzi, lactose-free curd |
| 6 | Oats upma with carrots (no onion) | Chicken or egg fried rice with spring-onion greens | Pineapple slices | Grilled chicken or tofu tikka, cucumber-tomato salad, rice |
| 7 | Banana and lactose-free milk smoothie | Rice, brinjal bharta (no onion-garlic), cucumber raita | Walnuts (a small handful) | Vegetable khichdi made mostly with rice and a small amount of split moong (watch how you respond), ghee |
Adjust portions to your appetite and energy needs. If you are vegetarian, rely on tofu, lactose-free curd, small portions of rinsed pulses, peanuts and seeds for protein, and plan Step 2 tests early so the diet doesn't stay too narrow.
IBS Diet Tips by Type
- IBS-C: build up soluble fibre (isabgol, oats, kiwi) slowly, drink enough water, and keep meal times regular. Avoid relying on wheat bran.
- IBS-D: eat smaller meals more often, limit caffeine, fried and very spicy food, and watch sugar-free products containing sorbitol.
- IBS-M: keep meals regular, change one thing at a time, and use your diary to see which end each food pushes you towards.
Common Low-FODMAP Mistakes
- Staying on Step 1 too long — strict restriction beyond about six weeks can reduce the variety of your diet and your gut bacteria
- Missing hidden onion and garlic in ready masalas, sauces, namkeen and restaurant gravies
- Using compounded hing that contains wheat flour
- Ignoring portion size — a small serving of a "moderate" food may be fine, while a large bowl triggers symptoms
- Cutting out food groups without replacing them, especially protein and calcium for vegetarians
When to Get Professional Help
A trained dietitian or IBS specialist can guide the diet so you don't cut out more than you need to. Get help sooner if you are losing weight, have a history of disordered eating, are pregnant, or have red-flag symptoms such as blood in your stool or diarrhea at night. If you'd like help building a plan around your IBS type and the food you eat at home, book a free IBS evaluation or explore our guide to IBS home remedies.
Looking for Expert Help?
If you're seeking a personalised plan tailored to your IBS subtype and symptom triggers, consulting a specialist is key. Explore options for the best IBS doctor in India to get expert guidance and effective management strategies.
Frequently asked questions
What can you eat on a low-FODMAP diet?+
Rice, poha, oats, quinoa, millet, potatoes, carrots, spinach, tomatoes, cucumber, capsicum, firm bananas, papaya, oranges, kiwi, eggs, chicken, fish, firm tofu, lactose-free milk and curd, hard cheese, peanuts and most spices are low-FODMAP.
What can't you eat on a low-FODMAP diet?+
In Step 1, limit onion, garlic, wheat in large amounts, rajma, chole and large bowls of dal, milk and soft cheese, apples, pears, mango, watermelon, honey, cashews and sugar-free sweets with sorbitol or xylitol.
How long should I follow the low-FODMAP diet?+
Follow the strict swap phase for 2 to 6 weeks, as Monash University advises, then reintroduce one FODMAP group at a time. The aim is a personal long-term diet, not permanent restriction.
Can I eat eggs on a low-FODMAP diet?+
Yes. Eggs contain no FODMAPs and are a good protein source on the diet — scrambled, boiled or as bhurji cooked without onion and garlic.
Is rice good for IBS?+
Yes. Rice is low-FODMAP and usually well tolerated, which is why plain rice, poha and rice-based dishes are good choices during IBS flares and in Step 1 of the diet.
Does the low-FODMAP diet work for IBS?+
It is the best-studied IBS diet. About three in four people with IBS improve on it, according to Monash University. If it hasn't helped after six weeks, talk to your doctor rather than restricting further.
What is a good low-FODMAP meal plan for beginners?+
Start with familiar meals made low-FODMAP: poha or oats for breakfast, rice with a tomato-ginger chicken, fish or tofu curry for lunch, and rice-flour roti with lauki or spinach and lactose-free curd for dinner, cooked without onion and garlic.
Is there a printable low-FODMAP food list?+
The two tables on this page — foods to eat and foods to limit — work as a printable list. For detailed portion sizes, the Monash University FODMAP app is the most complete resource.