According to Gram Research analysis of a 2026 systematic review of 33 studies, restrictive eating is common among adults with inflammatory bowel disease (IBD). Food avoidance was reported by 36 to 97% of people, and disordered eating ranged from 4.8 to 77%. Formal eating disorder diagnoses were rarely studied.
Many people with inflammatory bowel disease (IBD), a long-term condition that causes gut inflammation, avoid certain foods. According to Gram Research analysis of a 2026 systematic review of 33 studies, food avoidance was reported by 36 to 97% of adults with IBD, often to prevent symptoms or flares. Reported disordered eating ranged from 4.8 to 77%, but few studies diagnosed actual eating disorders. The strongest links were with gut-related anxiety, general psychological stress, and strict beliefs about diet. Restrictive eating was also more common in Crohn’s disease and during active disease. The reviewers found that studies used different definitions and tools, which makes the numbers hard to compare. The researchers say better tools are needed to tell sensible diet management apart from rigid eating patterns that could cause harm.
Key Statistics
A 2026 systematic review of 33 studies found that food avoidance was reported by 36 to 97% of adults with inflammatory bowel disease.
The same 2026 systematic review reported that disordered eating behaviors ranged from 4.8 to 77% across studies, with limited data on diagnosed eating disorders.
A 2026 systematic review found that restrictive eating was more frequently reported in people with Crohn’s disease and during periods of active disease.
The Quick Take
- What they studied: How often adults with inflammatory bowel disease avoid foods, show disordered eating, or have eating disorders, and what factors seem to go along with these patterns.
- Who participated: The review pooled 33 published studies of adults with IBD, which includes Crohn’s disease and ulcerative colitis. The total number of people across those studies was not reported in the summary.
- Key finding: Food avoidance was reported by 36 to 97% of people with IBD, and disordered eating ranged from 4.8 to 77% depending on the study. Anxiety about gut symptoms and general psychological stress were consistently linked to restrictive eating, often regardless of how active the disease was.
- What it means for you: If you have IBD and avoid foods, you are not alone. Cutting out foods to prevent symptoms is common, but persistent or rigid restriction may be worth discussing with your doctor or a dietitian, especially if anxiety about eating is part of the picture.
The Research Details
This was a systematic review, which means the researchers followed a set plan to find every relevant study they could on a topic, then combined the results. They searched six large medical and psychology databases from their start dates through January 2026. Their goal was to find studies that measured restrictive eating in adults with IBD.
To be included, a study had to be a full research report that used numbers to measure restrictive eating or factors linked to it in adults with IBD. In total, 33 studies met these rules. The reviewers then grouped the findings by how each study defined and measured restrictive eating, how common it was, and what factors were connected to it.
This approach is useful because no single study can answer the question well. By pulling many studies together, the review can show the overall range of findings and spot patterns that appear across different groups and settings.
Individual studies can vary a lot in size, setting, and method, so one study might give a misleading picture. A systematic review reduces that risk by looking at the full body of evidence in a structured way. For a topic like food restriction in IBD, where many people change their diets for good reasons, this helps separate common self-management from patterns that might be harmful.
Systematic reviews are generally considered one of the more reliable types of evidence because they use a clear search method. However, this review found that the included studies used very different definitions and questionnaires, and many tools were not tested specifically in people with IBD. That means the wide percentage ranges reflect differences in how studies measured things, not just differences in people. The review does not provide a single reliable number for how common restrictive eating is in IBD.
What the Results Show
Food avoidance was the most commonly reported pattern, with rates between 36 and 97% across studies. The highest rates appeared when studies asked about avoiding foods to prevent symptoms or disease flares. In other words, many people with IBD change what they eat because they are trying to feel better, which is a common and understandable response to a painful, unpredictable condition.
Disordered eating behaviors, which are unhealthy patterns such as severe restriction, skipping meals, or strict rules around food, ranged from 4.8 to 77% depending on the study. Formal eating disorder diagnoses were rarely studied, so the review could not say how often people with IBD meet the criteria for a clinical eating disorder. The very wide range shows how much the results depend on the tool used.
The review also found that restrictive eating was more often reported in people with Crohn’s disease than in some other groups, and during periods when the disease was active. Restrictive eating was not only a reaction to disease activity, though. Gut-specific anxiety, general psychological distress, and rigid beliefs about diet were consistently linked to restrictive behavior, and these links often held even when disease activity was taken into account.
Several studies suggested that worry about digestive symptoms may drive food avoidance, sometimes more than the actual state of the disease. This matters because it suggests that food fears could persist even when the gut is calm, and that they may respond to psychological support as well as medical treatment. The review also highlighted that the terms used across studies, such as food avoidance, disordered eating, and eating disorder, were often not clearly separated, which makes it hard to know whether two studies are measuring the same thing.
The findings fit with a growing view that food changes in IBD are common and can be a form of self-management. They also support earlier observations that anxiety and psychological stress play a role in how people with chronic gut conditions eat. The review adds value by bringing these scattered findings together and pointing out that the field needs clearer definitions and better-tested tools before stronger conclusions can be drawn.
The biggest limitation is that the studies themselves were very different from each other. They used different definitions, questionnaires, and populations, so the combined ranges are wide and should be read as a general picture rather than precise estimates. Many of the tools used were not validated for IBD, meaning they were not specifically tested to measure eating behavior in people with this condition. Diagnosed eating disorders were rarely studied, so the review cannot say how common they are. Finally, a systematic review can only include the studies that were published and found by its search, and the summary does not report the total number of participants.
The Bottom Line
Confidence is moderate that food avoidance is common in adults with IBD and that gut-specific anxiety and general psychological distress are linked to restrictive eating. Confidence is lower about exact prevalence rates, because the measures used across studies differ widely. A reasonable approach is to ask your care team about any ongoing food restriction, especially if it causes weight loss, nutritional gaps, or distress, and to consider working with a dietitian who understands IBD.
People living with IBD who avoid foods, along with their families, dietitians, gastroenterologists, and mental health professionals, should find these findings useful. People without IBD and people who eat freely with no symptoms or distress will likely find less direct relevance. Anyone with a history of an eating disorder should work with a qualified clinician before making any dietary changes.
Because this is a review of existing studies rather than a treatment trial, it does not provide a timeline for benefits. In practice, people who work with a dietitian or mental health professional often notice changes in their eating confidence and symptom management over several weeks to months, though results vary from person to person.
Frequently Asked Questions
How common is food avoidance in people with inflammatory bowel disease?
Food avoidance is widely reported in inflammatory bowel disease. A 2026 systematic review of 33 studies found rates between 36 and 97%, with the highest levels when people avoid foods to prevent symptoms or flares.
Does avoiding foods with IBD mean someone has an eating disorder?
Not necessarily. Food avoidance in IBD is often a symptom-management strategy. Reviewed research found disordered eating ranging from 4.8 to 77%, but few studies diagnosed actual eating disorders, so clinical assessment is needed to tell the difference.
What factors are linked to restrictive eating in IBD?
Gut-specific anxiety, general psychological distress, and strict beliefs about diet were consistently linked to restrictive eating in adults with IBD. These links often held even when disease activity was accounted for, according to a 2026 systematic review.
Is restrictive eating more common in Crohn’s disease?
Restrictive eating was reported more often in Crohn’s disease and during active disease periods, according to a 2026 systematic review of 33 studies. Researchers noted that measurement differences across studies make precise comparisons difficult.
Want to Apply This Research?
- Log each meal or snack along with a simple 1 to 5 rating for anxiety before eating and for any symptoms in the next 4 hours. Also record every food you intentionally avoid and the reason you gave yourself for avoiding it. Reviewing this weekly can show whether avoidance is tied to symptoms, to worry, or to a rule you have not questioned in a long time.
- When you notice you are avoiding a food, use the app to write down the symptom or fear behind it. Then try reintroducing one small, previously avoided food with your care team’s guidance, and log how you feel afterward. This builds evidence from your own experience and can reduce the grip of fear-based rules.
- Keep a monthly summary that tracks the number of foods you avoid, your anxiety ratings, your weight trend if your doctor wants it, and any flare symptoms. Share these trends with your care team at appointments so they can spot whether restriction is rising during flares or staying high during calm periods, which would signal a need for psychological support.
This article summarizes a systematic review of published research and is for general education only. It is not medical or nutritional advice. If you have inflammatory bowel disease and are avoiding foods, or if eating causes you anxiety or distress, talk with your gastroenterologist, registered dietitian, or mental health professional before making changes. Do not stop or start any treatment based on this summary.
This research translation is published by Gram Research, the science division of Gram, an AI-powered nutrition tracking app.