How long do FODMAP symptoms last?

How long do FODMAP symptoms last? & What are FODMAP foods to avoid? Here, we will explain everything you need to know about FODMAP

What is a FODMAP Diet?

Recently, you may have heard about the FODMAP elimination diet, and ask What is a FODMAP Diet, and who suffers FODMAP intolerance to choose FODMAP free foods over regular food.

The word FODMAP stands for Fermentable Oligo-Di-Mono-Poly saccharides. 

However, intestines don’t absorb these types of carbohydrates. Instead, bacteria living in the intestine ferment it and feed on it.

In fact, this process produces gases that may cause symptoms like bloating in individuals suffering from IBS.

FODMAP foods include wheat, onions, garlic, legumes.

Also, lactose found in milk, yogurt and soft cheeses can 

Monosaccharides means single-chain of sugar units, while disaccharide double chains, Polysaccharide means multiple chains of sugar units. 

which enters fructose which is in honey and apple, high-fructose corn syrup

polyols means that contain sorbitol and mannitol, which are present in some fruits and vegetables, and they are also artificial sweeteners.

Check out other elimination diet (AIP for auto-immune diseases).

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Who may have FODMAP intolerance?

The FODMAP diet is a therapeutic diet, not a healthy diet for normal people. So far, doctors recommend it to treat the following diseases:

  1. Irritable Bowel Syndrome: FODMAP for IBS patients proved to be successful. So, doctors recommend a low FODMAP diet for people who have symptoms even after following general nutritional advice for patients with irritable bowel syndrome. According to a scientific study, the FODMAP diet has an 80% success rate in eliminating symptoms in patients. 
  2. Inflammatory bowel diseases: Like Crohn’s disease and ulcerative colitis, following a FODMAP diet may be beneficial for people with these diseases, especially if they suffer from irritable bowel syndrome at the same time.

Check out how to know if you are gluten- intolerant.

More cases may benefit from low FODMAP diet plan:

3. People who suffer from bloating: You can consume the low FODMAP foods to completely eliminate bloating and then start the adaptation stage to identify foods that cause gas and eat small amounts of them.

4. Small intestine bacterial overgrowth: There is insufficient evidence for its use in SIBO.

5. Digestive functional problems in children: Doctors don’t recommend following the FODMAP diet plan for children. Thus, it may expose them to a deficiency of a nutrient during their growth.

How do FODMAP high foods cause symptoms in IBS patients?

What is a FOPMAP Diet
What is a FODMAP Diet

FODMAP high foods contain short-chain carbohydrates that are not absorbed through the intestine.

Eventually, it increases gases in the digestive system because of their fermentation by bacteria. However, good bacteria in the digestive system feeds on it and they also increase water in the intestine through osmosis, which makes you feel bloated and in pain. 

How long do fodmap symptoms last?

If you had FODMAP intolerance and ate a high FODMAP diet you probably will start to experience digestive symptoms. These symptoms include bloating, stomach pain, pale stool, within 2-8 hours. These symptoms are a strong indication of malabsorption. This means that the intestines digested part of the food successfully, while the other part, arrived at the colon undigested.

However, the transit time (complete food journey from eating to elimination) can take up to 72 hours. So, FODMAP intolerance symptoms may last for 3 days after ingestion of high-FODMAP food. This means that the symptoms subside after the complete elimination of this food from the digestive system.

How to implement a FODMAP diet

First, the FODMAP diet plan comprises 3 basic stages. Contrary to what some may think, the FODMAP diet does not apply for a lifetime, but only for 2-6 weeks.

  • Induction stage: The stage of stopping any foods containing high levels of FODMAPs and lasts from 2 weeks to 6 weeks. The goal of this stage is to eliminate symptoms completely so you can start the second stage.
  • FODMAP reintroduction stage: At this stage, the nutritionist or your doctor begins by suggesting you eat certain foods that contain high levels of FODMAPs in small quantities. However, if you do not have new symptoms, he increases the amount until these foods become part of your diet without problems. The same applies to the rest of the varieties. But if you get symptoms after eating these foods, you will refrain from again until the symptoms disappear and you experiment with another variety.
  • The life time stage: After entering the adaptation process and identifying the foods you could eat without problems, both in terms of quantity and type, you will be ready for life with a relatively natural diet.
  • After you have identified the items that cause you symptoms and know the quantities that cause your symptoms, you will avoid these items or eat them lightly.
  • Usually, you will find that these items are few and easy to avoid.

Why FODMAP diet not followed for life?

There are two reasons that prevent the application of the diet life long:

  • That these foods are healthy and beneficial to normal healthy people, as they play a vital role in increasing the growth of beneficial microorganisms in the intestine, in the absorption of minerals, and improving the function of the immune system, and have many positive effects in metabolism. In the body.
  • Some of these foods are prebiotics, which are dietary fibers that aid the growth of beneficial bacteria in the intestine called probiotics
  • Long-term implementation of this diet may lead to negative results due to the loss of many important nutrients.
  • Following the FODMAP meal plan is difficult, as research is currently working to determine the compounds that cause symptoms more accurately so that the diet becomes easier and contains only specific varieties.

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What are FODMAP foods to avoid?

Although the FODMAP list includes a lot of varieties, there are still many foods that can be eaten.

How long do FODMAP symptoms last?
How long do FODMAP symptoms last?
FFermented by bacteria in your intestinal flora
OOligo-saccharidesfructose and galactose wheat, barley, rye, onions, leeks, the white part of lettuce, garlic, onions, artichokes, beets, fennel, peas, dandelion, pistachios, cashews, legumes, lentils, chickpeas.
DDisaccharideslactoseMilk, custard, ice cream, yogurt
Mmono-saccharidesfructoseMangoes, Apples, cherries, melons, asparagus, peas, pears, honey, high fructose corn syrup.
PPolysaccharidessorbitol, mannitolApples, pears, apricots, cherries, nectarines, peaches, watermelons, and melons. Mushrooms, cauliflower, gum, artificial sweets, and sweets.
What is a FODMAP Diet

When FODMAP doesn’t work?

Despite positive results, and that it is one of the treatment methods that a doctor may use with the patient to treat irritable bowel syndrome, some people may not feel better after following it.

But be aware that you fall into one of these mistakes, as it may be the reason the low FODMAP diet doesn’t work with you : 

  1. Failure to check the ingredients in processed foods as these products may contain additives that may be among the FODMAPs.
  2. Follow an inaccurate FODMAP list.
  3. If you are facing a stressful moment in your life, it will be difficult to judge the success of your diet, as stress increases symptoms.


  • FODMAP definition is carbohydrate compounds that are not easily absorbed in the intestine. They increase water and gases in your body, which makes you bloated and worsens symptoms in patients with IBS.
  • Usually, a FODMAP is not followed until after trying general nutritional advice.
  • A FODMAP diet is a therapeutic diet, so you must make sure a specialist diagnose you before starting it. It is wrong to apply it to healthy people.
  • A FODMAP diet is prescribed by a doctor or dietitian, and following it on your own and relying on an incorrect FODMAP diet list will expose you to a nutrient deficiency.
  • The FODMAP diet is not applied for life, but for 2 to 6 weeks, then, you reintroduce FODMAP food gradually.
  • When you follow this diet, you should not exclude foods that contain low levels of these sugars, as they are a good source of nutrients, as the FODMAPs diet takes care to avoid foods that contain high levels only.
  • Still there are studies to determine more precisely which compounds and foods cause symptoms, how to improve this diet and its effects on the body over the long term.

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