Thousands with IBS are quietly trapping themselves in the low FODMAP Elimination Phase—risking their gut health and quality of life in the process.
Every single day we hear from FODMAP community members that they are stuck in the Elimination Phase. The reasons are varied, but come down to five main reasons:
- IBS sufferer decided on their own to try the low FODMAP diet
- The patient feels great during Elimination and is afraid to move on
- They do not understand why they must move onto the Challenge Phase
- They do not know how to determine whether they are ready for that second Challenge Phase
- The diet isn’t providing relief, and they are frozen in place, thinking if they continue doing what they are doing, that their digestion will eventually settle down.
If you take one thing from this article, it is this: It is physically and psychologically damaging to your health to remain in the Elimination Phase of the low FODMAP diet. The diet has three phases, and sticking with Elimination is not “doing the diet,” nor is it going to help you determine your triggers, and it will be detrimental to you in the long run.
So, how do you move on? We are going to break it down for you; we want you to have relief, to learn what your irritable bowel syndrome (IBS) triggers are, and to have a great relationship with food. We want to help you feel excited about dining with friends; to have no fear around food choices, and to feel in control.
The GREAT news (spoiler alert) is that there is a common answer to all these issues.
- #1: I Am in So Much Pain; I’m Going to Try the Low FODMAP Diet
- Monash-Trained Dietitians: The Success Factor
- #2: I Feel Great! I Am Afraid Of Moving Out of the Elimination Phase
- #3. Why Bother Progressing to the Challenge Phase if I Feel Great in Elimination?
- #4 How Do I Know If It Is Time To Move Onto The Challenge Phase?
- #5: I Am in the Elimination Phase, But My Gut Has Not Calmed Down Yet
- The Payoff of Moving Onto The Challenge Phase
- BUT I'M STILL STUCK!
#1: I Am in So Much Pain; I’m Going to Try the Low FODMAP Diet
This is the easiest to address. The low FODMAP diet is a medically directed diet. It should be prescribed by a medical doctor or a Monash-trained Registered Dietitian. If you have self-diagnosed yourself with irritable bowel syndrome (IBS), or determined on your own through “Dr.” Google that you “should” try the diet, you are starting without a scientifically sound basis.
The diet might not be right for you; therefore, it is not surprising that you feel stuck.
THE SOLUTION: Get an accurate diagnosis from a medical doctor. If they suggest trying the low FODMAP diet, do so along with a FODMAP-trained Registered Dietitian (RD). Please see Sidebar below.
Monash-Trained Dietitians: The Success Factor
The low FODMAP diet is nuanced and complex. Statistically and anecdotally, patients will be more successful when working with a Registered Dietitian (RD), success defined as learning triggers (food and non-food) and achieving symptom management. And all of that will be achieved in the most direct and economical way possible when working with an RD, so you will spend less time in pain.
Here are the top three reasons why people do not work with a RD, and the solutions:
PROBLEM #1: The patient is not told by their doctor that the diet was always intended to be undertaken along with a trained RD, per Monash University researchers’ direction.
SOLUTION: This is a hard one. All we can do is reach out and educate as many doctors and patients as we can; help spread the word.
PROBLEM #2: Patients cannot find a RD to work with.
SOLUTION: As with any medical professional, it might take a bit to find a RD that is right for you. Begin with our Global Registered Dietitian Directory, or Monash’s. It is vitally important to work with a FODMAP-trained RD and to understand that you do not have to limit yourself to your area. Many patients are working with RDs all over the world, and many dietitians offer remote sessions.
PROBLEM #3: Patients believe they cannot afford to work with a RD.
SOLUTION: We understand that finances are personal, but hear us out. If you broke your arm, you would go to the doctor to have it properly set. If you had chest pain, you would head straight to the emergency room. You would not set your own dislocated shoulder after watching a tutorial online. You would not try to diagnose or treat those situations on your own because the stakes are simply too high.
Digestive health deserves that same level of respect. The low FODMAP diet is not meant to be a DIY guessing game. It is a structured clinical tool that works best when tailored to your individual physiology, symptoms, and medical history.
Working with a FODMAP-trained Registered Dietitian can actually save money in the long run by helping you avoid unnecessary food restrictions, expensive trial-and-error grocery spending, and prolonged time stuck in the Elimination Phase.
This bears repeating: We have seen again and again that it is more economical to work with a trained dietitian from the moment of diagnosis.
Many dietitians offer virtual sessions, package pricing, or accept insurance, and even a few targeted appointments can make a meaningful difference in outcomes. You do not have to think of RD appointments as a long-term, ongoing expense.
The goal is not perfection. It is progress, clarity, and getting you back to eating as broadly and comfortably as possible.
#2: I Feel Great! I Am Afraid Of Moving Out of the Elimination Phase
You are not alone. For many people, they have been suffering for years, and the Elimination Phase finally provides relief. The thought process is, “why should I change anything? I feel great, and I am afraid that moving to the Challenge Phase will trigger symptoms!”
A fear of being in pain and triggering symptoms is common, however, if that fear stops you from progressing, then it is a problem.
You may have heard of eating disorders, like anorexia nervosa or bulimia. There is something called “disordered eating.” Disordered eating and eating disorders exist on the same spectrum, but disordered eating does not meet the clinical criteria for an eating disorder diagnosis. At its core, disordered eating is often driven by fear. It could be fear of gaining weight or body appearance, or for those following the low FODMAP diet, the fear of being in pain.
Within the low FODMAP diet, fear can drive disordered eating patterns. These could include skipping meals, restricting food intake, eliminating specific foods or food groups, or an over-reliance on laxatives. Some people even fast, because they believe that any food triggers symptoms.
THE SOLUTION: We are going to sound like a broken record, but the way to move beyond this fear is to work with a FODMAP-trained Registered Dietitian (RD). Please see Sidebar above.
#3. Why Bother Progressing to the Challenge Phase if I Feel Great in Elimination?
The Elimination phase was designed by Monash University researchers to be a short diagnostic tool, not a permanent way of eating.
It is not nutritionally balanced, and when you hear doctors say, “the low FODMAP diet is not long-term,” they are referencing this initial phase. There are also psychological issues involved.
The main reasons for moving onto the Challenge Phase are to determine your actual FODMAP-related triggers, and, to move you towards a broader diet, which will be nutritionally and psychologically sound.
For the long-term health, you must move through the three-phases of the diet.
We understand that you “feel fine” now, perhaps even great, but consider the following issues of remaining at the Elimination Phase.
- Less fuel for beneficial bacteria: Many high-FODMAP foods contain prebiotic fibers that nourish helpful gut microbes. Long-term restriction starves them.
- Reduced microbial diversity: A limited range of plant foods lowers the variety of bacteria in the gut, and lower diversity is linked to poorer gut health.
- Fewer butyrate producers: Some bacteria make butyrate, a short-chain fatty acid that supports the gut lining. Without fermentable carbs, these populations can decline.
- Weaker gut barrier support: Reduced fermentation means fewer short-chain fatty acids to help maintain colon cell health and gut integrity.
- Decreased gut resilience: A highly restricted diet can make the microbiome less adaptable and potentially more sensitive over time.
- Reduced food tolerance over time: Avoiding fermentable foods indefinitely may lower your ability to tolerate them later.
- Lower intake of beneficial plant compounds: Restricting a wide range of fruits, vegetables, grains, and legumes limits polyphenols and other compounds that support microbial health.
- Psychological strain from prolonged restriction: Staying in Elimination keeps you in a narrow, rule-heavy eating pattern, increasing anxiety around food and reinforcing fear of symptoms.
- Reduced participation in daily life: Ongoing restriction can make social events, travel, dining out, and shared meals feel stressful or off-limits, limiting spontaneity and diminishing quality of life.
If some of these points are new to you or surprising, or perhaps you do not quite understand them, don’t worry.
THE SOLUTION: A Registered Dietitian trained in the low FODMAP diet can guide you through the process. They help interpret your individual reactions, consider compounding factors such as co-existing digestive conditions (which affect about 37% of people with IBS), and address non-food triggers that may be influencing symptoms. Please see Sidebar above.
#4 How Do I Know If It Is Time To Move Onto The Challenge Phase?
The Elimination Phase typically lasts for about 2–6 weeks; higher FODMAP foods are reduced to calm your gut and create a clear baseline. The exact timing is not important, as long as it remains relatively within this window. What is important is that your symptoms have calmed down. Some people experience relief in the first couple of days; for others, it takes a little longer.
If your gut has calmed down, this is great news! It means you do have some FODMAP intolerances and the Challenge Phase is going to help you home in on the specifics.
- REASONS TO PROCEED TO CHALLENGES: If you’ve completed 2–6 weeks of the low FODMAP diet AND symptoms have improved, you are likely ready to begin Challenges. You are looking for bloating, pain, or stool patterns to be noticeably better than your baseline. Most people who will benefit from the diet will see improvement within this window.
- REASONS TO NOT PROCEED TO CHALLENGES: Hold off if you are in an active flare, recovering from a GI illness, or dealing with major new digestive disruptions. Challenges work best when symptoms are stable.
- REASONS TO SEEK HELP: Your symptoms have plateaued. If symptoms improved and then leveled off, stricter eating usually will not help further. This plateau is sometimes a signal to begin Challenges; however, this decision should be guided by a FODMAP-trained Registered Dietitian.
THE SOLUTION: Partnering with a FODMAP-trained Registered Dietitian takes the guesswork out of the process. They can evaluate whether your time in the Elimination Phase has yielded clear, usable results and guide you on when to advance. An experienced RD looks beyond food lists—analyzing your personal symptom patterns, factoring in co-existing digestive conditions (present in about 37% of people with IBS), and identifying non-food influences that may be driving symptoms. Please see Sidebar above.
#5: I Am in the Elimination Phase, But My Gut Has Not Calmed Down Yet
As noted earlier, the Elimination Phase is designed to last about 2 to 6 weeks. It is not meant to stretch to 6 months, 18 months, or even several years—yet that is exactly what many of you tell us this is what you are doing.
If you have not experienced symptom relief, there are a few key reasons why this might be happening:
- You self-diagnosed your digestive issues
- The low FODMAP diet was not medically prescribed
- You are not following the diet correctly for YOU
- There are non-FODMAP related food intolerances or medical issues at play
- Non-food triggers could be affecting you
THE SOLUTION: Diagnosis should come from a gastroenterologist after they have ruled out potentially more serious medical conditions, such as IBD, diverticulitis, celiac disease (and there are many more to address). Once you have an accurate diagnosis, if the low FODMAP diet is prescribed, please work with a FODMAP-trained Registered Dietitian.
Monash explicitly recommends working with a FODMAP‑trained dietitian for all three steps to protect nutrition, troubleshoot results, and build skills for long‑term self‑management. Please see the Sidebar above.
The Payoff of Moving Onto The Challenge Phase
More foods, more joy: By the time you finish the Challenge Phase, you will know your digestive triggers. Variety, flavor, and creativity will be restored in the kitchen and your food choices.
Better nutritional adequacy: By reintroducing tolerated foods from different groups, you expand your intake of fiber, vitamins, minerals, and plant compounds that support overall health and a robust microbiome.
A calmer, more confident relationship with food: Once you’ve collected your own data through challenges, you stop living by generic “yes/no” lists and start making decisions from a place of knowledge. This personalized knowledge reduces anxiety and allows for flexibility, including pausing the diet or re‑testing foods later as your gut changes
BUT I’M STILL STUCK!
If you’re reading this and thinking, “That all sounds great, but I’m terrified,” that’s exactly who this article is for. The fact that you feel better in Elimination is proof that your gut responds; the next step is learning how much freedom you can win back without losing that progress. With a FODMAP‑trained dietitian in your corner and a structured, stepwise plan, moving past Elimination is the most responsible thing you can do for your long‑term health and quality of life.
References
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Staudacher HM, et al. Long-term personalized low FODMAP diet improves symptoms and maintains luminal Bifidobacteria abundance. Am J Gastroenterol. 2021;116(6):1245-1256. https://doi.org/10.14309/ajg.0000000000001535
Peng L, Li ZR, Green RS, Holzman IR, Lin J. Butyrate enhances the intestinal barrier by facilitating tight junction assembly. J Nutr. 2009;139(9):1619-1625. https://doi.org/10.3945/jn.109.104638
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