Low FODMAP Diet: Food List, Phases and a Sample Meal Plan

6 days ago

8 min read

Simple low FODMAP meal on a kitchen table

The low FODMAP diet is a short-term, three-step eating plan that helps people with irritable bowel syndrome (IBS) find out which fermentable carbohydrates set off their bloating, pain, gas and diarrhea or constipation. You cut back on high-FODMAP foods, test them one group at a time, then rebuild the widest diet your gut tolerates. It is not meant to be a forever diet, and it works best with a clinician guiding you.

Below you will find the food list, the three phases, a sample day of meals, how the diet compares with keto and a general elimination diet, and the mistakes that most often make it fail.

TL;DR

FODMAPs are a group of fermentable carbohydrates (oligosaccharides, disaccharides, monosaccharides and polyols) that can trigger symptoms in people with IBS.
The diet has three phases: restriction, reintroduction and personalization. Restriction is short, usually 2 to 6 weeks.
Its real value is the last phase. Staying on the strict version long term risks nutritional gaps and a less diverse microbiome.
If you see no improvement after the restriction phase, stop and go back to your usual eating, then talk to your clinician about other causes.
Get diagnosed first and work with a dietitian or clinician. Persistent gut symptoms deserve a medical workup, not only a diet.

What the low FODMAP diet is, and who it is for
The three phases
Low FODMAP food list: what to eat and what to limit
A sample low FODMAP day
Low FODMAP vs elimination diet vs keto
Mistakes that make the diet fail
Our perspective at Green Circle Wellness
Getting support with your plan
FAQ
Sources

What the low FODMAP diet is, and who it is for

FODMAP stands for fermentable oligo-, di-, mono-saccharides and polyols. These carbohydrates are poorly absorbed in the small intestine. They draw in water and are fermented by gut bacteria, which produces gas. In a sensitive gut, that can mean pain, distension and changes in bowel habits.

The American Gastroenterological Association calls the low FODMAP diet the most evidence-based diet intervention for IBS. Its guidance says the diet suits patients who can connect symptoms to meals and are motivated to change how they eat, and it recommends working with a registered dietitian, ideally one with gastrointestinal training, because the plan is complex.

How well does it work? A 2024 meta-analysis presented in the American Journal of Gastroenterology found a significant drop in IBS symptom severity scores and better quality of life compared with control diets. Reported response rates run from roughly half to more than four in five patients. That also means a meaningful minority do not respond, and Johns Hopkins Medicine is clear that the diet is not a cure and will not help everyone.

Two groups should be careful. If you have not been diagnosed, bloating or changing bowel habits can come from celiac disease, inflammatory bowel disease or other conditions, so see a gastroenterologist or your primary care clinician first. And if you have a history of disordered eating, discuss it before starting any restrictive plan: researchers have flagged an increased risk of disordered eating when people restrict without professional support.

The three phases

Phase 1: Restriction (2 to 6 weeks)

You swap high-FODMAP foods for low-FODMAP ones. An evidence-based clinical review describes this phase as lasting no more than 4 to 6 weeks, to limit nutritional risk. The goal is symptom relief, so you have a calm baseline to test against.

Check your progress at about two weeks and again near the end. If symptoms have not improved by the end of this phase, the diet is not the answer for you. Return to your regular diet rather than staying restricted for no benefit.

Phase 2: Reintroduction (usually 6 to 8 weeks)

This is where the diet becomes personal. You test one FODMAP group at a time, with a specific food, in rising portions, while the rest of your diet stays low FODMAP. The same review describes adding one high-FODMAP food roughly every three days, so any reaction can be traced to a single cause.

Choose test foods carefully. Many foods contain several FODMAP types, so a mixed food muddies the result. The Monash University team, who developed the diet, suggests using single-FODMAP challenge foods, such as mango for fructose and honey for excess fructose, and logging results in a diary. Monash also published an update on newly tested reintroduction foods, so check current guidance rather than an old handout.

Phase 3: Personalization (ongoing)

Now you bring back every food and portion you tolerate and keep limiting only what you do not. The aim is the least restrictive, most varied diet that keeps you comfortable. Many people find they tolerate small servings of foods they feared, and that only one or two FODMAP groups matter to them. You can also retest a trigger months later, because tolerance can change.

Low FODMAP food list: what to eat and what to limit

Food lists are a starting point. FODMAP content depends on portion size, and it can vary with ripeness, growing conditions and batch. Monash notes that serving sizes and ratings have been adjusted over time, which is why practitioners point to the official Monash University FODMAP app over static printouts.

Using the examples from Johns Hopkins, here is a practical snapshot:

Food group	Often high in FODMAPs (limit in phase 1)	Often lower in FODMAPs
Grains	Wheat bread, wheat pasta	Rice, oats, quinoa
Vegetables	Onions, garlic, certain legumes	Tomatoes, cucumbers, potatoes
Fruit	Apples, pears, cherries, peaches, mango	Oranges, kiwi, berries, grapefruit, bananas
Dairy	Milk and yogurt (lactose)	Aged cheeses such as Parmesan and cheddar
Protein	Some legumes	Eggs, plain meats

Some notes that help in practice:

Garlic and onion are everywhere. Check sauces, broths, spice blends and processed meats. Garlic-infused oil and the green tops of scallions are common workarounds, but confirm them in the app.
Portions matter. A food rated low at one serving can become high at a larger one. Stacking several moderate-rated foods in one meal can add up.
Gluten-free is not the same as low FODMAP. Wheat is restricted because of its fructans, not gluten. Many gluten-free products contain other high-FODMAP ingredients.
Fiber still counts. Oats, potatoes, carrots, spinach and permitted fruits help you keep fiber up while restricting.

A sample low FODMAP day

This is an illustration of how a restriction-phase day can look, not a prescription. Portions, calories and protein targets depend on you, and a dietitian can tailor them. Verify each item and serving in the Monash app.

Breakfast: Oatmeal made with rolled oats and water or lactose-free milk, topped with a small handful of blueberries and a spoonful of pumpkin seeds.
Lunch: Grilled chicken over rice with sliced cucumber, tomato and carrot, dressed with olive oil and lemon.
Snack: A kiwi, or a few rice cakes with peanut butter.
Dinner: Baked salmon with roasted potatoes and zucchini, seasoned with fresh herbs, salt and pepper, and a little chive.
Drinks: Water, plain tea such as peppermint or green, and coffee if it does not bother you.

A week of meal planning mostly comes down to a few habits. Batch-cook plain proteins and grains. Keep a small list of safe sauces and dressings. Cook from scratch where you can, since labels hide garlic and onion. Then write down what you eat and how you feel, because that diary is the raw material for phase 2.

Low FODMAP vs elimination diet vs keto

Low FODMAP vs a general elimination diet. Clinically, the low FODMAP diet is itself an elimination diet. Cleveland Clinic describes it as removing foods, then adding them back systematically to see how your body responds. The difference is the target. A broad elimination diet removes common problem foods such as dairy, gluten, eggs or soy and looks for a food sensitivity. The low FODMAP diet removes specific fermentable carbohydrates and is tested mainly in IBS. If you are unsure which fits, a structured conversation with a clinician comes first. We cover the testing side in our guide to food sensitivity testing, including why a home IgG panel cannot diagnose an allergy.

Low FODMAP vs keto. Keto restricts total carbohydrate to push the body toward ketosis, mainly for weight or metabolic goals. Low FODMAP restricts specific carbohydrate types and still allows rice, oats and potatoes. The two overlap by accident, since both cut wheat and many sweet fruits, but a keto diet is not automatically low FODMAP (many keto foods, such as garlic-heavy sauces, certain sugar alcohols and some nuts, are high FODMAP). Neither is a stepping stone to the other, and we do not suggest stacking them without supervision.

Mistakes that make the diet fail

Staying in phase 1. The restriction-only version can lead to nutritional deficiencies and reduced microbiome diversity. Put reintroduction on the calendar before you start.
Skipping the diagnosis. Self-treating symptoms that could be celiac disease or IBD can delay care.
Using outdated lists. Ratings change. Use a current, official source.
Testing mixed foods. A pizza slice tells you little. A single-FODMAP challenge tells you a lot.
Ignoring non-food triggers. Stress, sleep, hormones, medications and gut infections also drive symptoms. Diet is one lever, not the whole picture.
Going it alone. The AGA’s advice to involve a dietitian exists because of the pitfalls above. For a sense of what that support looks like in another nutrition-heavy setting, see this overview of how dietitians guide patients through a structured eating plan.

Our perspective at Green Circle Wellness

We see the low FODMAP diet as a tool for finding answers, not as an identity. People often arrive after months of cutting foods on their own, tired, undernourished and still symptomatic. What helps most is time: enough of it in the visit to hear the full history, look at the pattern of symptoms, and decide whether FODMAPs are even the right question.

In our integrative model, the diet is one input among several. We think about the whole picture: medications, stress, sleep, hormones, and the gut itself. Testing can help when it changes what you do next, and not otherwise. We have written about which functional medicine tests actually change care and about why stool panels need a clinician to interpret them. Likewise, we favor starting with food before reaching for probiotics.

Our advice is simple. Do the restriction phase for as short a time as you need, treat reintroduction as the main event, and aim to end up eating more foods than you started with. If the diet does not help, that is useful information too, and it is a reason to look elsewhere rather than restrict harder.

— Dina

Getting support with your plan

If you live in Chicago or Illinois and want help deciding whether a low FODMAP approach fits, our nutritional consultations give you time to talk through your symptoms, food history and goals. If your gut issues sit alongside fatigue, autoimmune concerns or hormone changes, our functional medicine team looks at the wider picture. You can also read how we work on our approach page or browse all services.

FAQ

What can you eat on a low FODMAP diet?

Plain meats, fish and eggs, rice, oats, quinoa, potatoes, tomatoes, cucumbers, carrots, aged cheeses, and fruits such as oranges, kiwi and berries are commonly well tolerated. Portion size matters, so check each food in the official Monash FODMAP app.

What can’t you eat on a low FODMAP diet?

During restriction, you limit wheat products, onions, garlic, some legumes, milk and yogurt, and fruits like apples, pears, cherries and peaches. These are the common offenders, not a permanent ban, and many will be tested again in phase 2.

How long should you stay on a low FODMAP diet?

The strict restriction phase should be brief, about 2 to 6 weeks, and no longer than 4 to 6 weeks according to the clinical review cited above. Then you reintroduce foods and personalize your diet. If you notice no improvement, stop the restriction and return to your usual diet.

Do you need a dietitian for the low FODMAP diet?

The American Gastroenterological Association recommends working with a registered dietitian, particularly one trained in GI conditions. The diet is complicated, and professional guidance helps protect nutrition and makes reintroduction results easier to read.

Is the low FODMAP diet the same as an elimination diet?

It is a type of elimination diet. It removes a specific set of fermentable carbohydrates rather than common allergens, then reintroduces them one group at a time to learn your personal triggers.