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Low FODMAP Diet

The low-FODMAP diet reduces certain kinds of carbohydrates that are hard for people to digest VSports. It’s often prescribed as an elimination diet to identify food triggers in those who have functional gastrointestinal disorders, such as IBS.

Treatment Details

What should I do before starting the low-FODMAP diet?

Consult a reliable healthcare provider. Whether you’ve already been diagnosed with a gastrointestinal (GI) disease or you are just beginning to explore possible causes and cures for your symptoms, a registered dietitian or GI specialist can help set you in the right direction. They may have alternative ideas to test before you try the diet. They can also help guide you through the nuances of the diet, provide shopping and menu guides and troubleshoot when questions or problems arise. There’s a lot to keep track of with this diet, including different quantities and portion sizes for different foods. It’s easier to follow successfully if you have a guide who knows the way around.

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Plan ahead. This is a temporary diet, but it’s a significant investment of time and trouble in the meantime. Make sure you reserve a chunk of time to complete it when it won’t conflict with other important events or obligations. You can’t cheat on an elimination diet — the whole experiment collapses if you do. Make an intentional commitment to yourself to complete the process before you start. Be deliberate about setting the stage. Clear your fridge and pantry of high-FODMAP foods and prepare some menu plans in advance. Make sure you have ingredients for a few simple standby meals that you know you can prepare and enjoy easily.

How long should I stay on a low-FODMAP diet?

Phase 1: Healthcare providers recommend at least two weeks and no more than six weeks for the elimination phase. It can take time for this phase to work and your symptoms to subside. If you have SIBO, the process of starving your overgrown gut bacteria may produce detox symptoms, making you feel worse before you feel better. But even if you feel great on the elimination phase, it’s not meant to be permanent. It’s important to find out which foods you may be able to reintroduce and tolerate. A more moderate diet will be easier to maintain over time, and in nutrition, variety is always the best policy for getting all of your micronutrients.

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Phases 2 & 3: The length of the reintroduction phase can vary depending on the individual, but the average time is about eight weeks. During this phase, you’ll stay on the low-FODMAP diet while reintroducing a high FODMAP food from each FODMAP category, one at a time. You’ll spend a few days testing each food in increasing quantities to find your tolerance threshold. Between each test, you’ll spend a few days back on the strict elimination diet to avoid any crossover effects. Once you find out what works for you and what doesn’t, you and your healthcare provider can put together a sustainable, nutritious diet plan that you can keep indefinitely, or until you want to retest.

What if it doesn’t work for me?

It’s an experiment, and it may not work. But if you follow the diet under expert guidance, it’s safe to try. Your healthcare provider will keep an eye on your general nutrition and any deficiencies or weight loss that may occur. They’ll tell you when it’s time to stop and try something else. The low-FODMAP diet has a high predicted success rate for people with IBS, but up to 25% may not benefit. For all other conditions, research is more limited, but there’s reason to believe it may help with symptom management in cases of SIBO, IBD and functional dyspepsia. If it doesn’t, your journey isn’t over — there are other kinds of elimination diets, tests and therapies to try.

A note from Cleveland Clinic

The low-FODMAP diet is a specific approach to identifying and reducing foods that may be irritating your gut and causing you gastrointestinal distress. If you have chronic symptoms or food sensitivities, you might benefit from following the systematic elimination process. Although it’s strict in the short term, this is not a lifestyle diet. The intent is to isolate your food triggers and then reintroduce as many foods as possible. Many of the foods identified as FODMAPs represent a normally healthy diet. They include nutritious vegetables, fruits and whole grains. These aren’t “bad” foods — but eliminating the ones that trouble you can help you enjoy the ones that don’t.

Medically Reviewed

Last reviewed on 02/24/2022.

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