Honestly, even if you don’t have IBS, following some of these eating guidelines might help you combat the occasional bloated, upset stomach. I always tell my patients, we don’t all have IBS, but once in a while we can have IBS-type symptoms. If you have IBS, here’s how a dietitian can help, and what dietary changes actually make a difference.
If you have irritable bowel syndrome (IBS), you’ve probably already figured out that food matters. A lot.
But the frustrating part is that there’s no single “IBS diet.” What helps one person can make someone else feel worse. That’s where working with a dietitian—especially one familiar with IBS—can be a game changer.
IBS is a gut–brain interaction disorder, meaning your intestines are more sensitive to:
Stretch (gas, stool)
Certain carbohydrates
Changes in motility
Stress
Food doesn’t cause IBS—but it can absolutely trigger symptoms like:
Bloating
Abdominal pain
Diarrhea
Constipation
The goal isn’t restriction.
The goal is identifying your specific triggers, and eliminating them.
An IBS-trained dietitian doesn’t just hand you a list of foods to avoid.
They help you:
Identify Your Triggers (Without Guessing)
Instead of random elimination diets, they guide you through structured approaches, like:
Symptom tracking
Food diaries
Systematic reintroduction
This helps separate:
👉 real triggers from
👉 unnecessary restrictions
The low FODMAP diet is one of the most evidence-based dietary approaches for IBS.
FODMAPs are fermentable carbohydrates that can cause:
Gas
Bloating
Diarrhea
Common high-FODMAP foods include:
Onions, garlic
Dairy (lactose)
Wheat products
Certain fruits (apples, pears)
But here’s the key:
A low FODMAP diet is not meant to be permanent.
A dietitian helps you:
Eliminate → then
Reintroduce → then
Personalize
Without guidance, people often over-restrict long-term, which can harm gut health.
Fiber advice for IBS is often oversimplified.
Some fiber helps. Some makes things worse.
A dietitian helps tailor:
Soluble fiber (psyllium, PHGG) → often helpful
Insoluble fiber (bran) → may worsen symptoms
The goal is the right type and dose, not just more.
IBS isn’t one condition—it has subtypes:
IBS-C (constipation)
IBS-D (diarrhea)
IBS-M (mixed)
Diet strategies differ:
IBS-C → fiber, hydration, magnesium
IBS-D → FODMAP reduction, bile acid considerations
IBS-M → more nuanced balancing
A dietitian helps individualize this.
This is where I think dietitians help the most. Many IBS patients end up cutting out:
Dairy
Grains
Fruits
Over time, this can lead to:
Low calcium
Low fiber
Vitamin deficiencies
A dietitian ensures you’re still meeting nutritional needs while managing symptoms.
Across patients, a few patterns consistently show benefit:
But again—personalization matters more than rules.
IBS isn’t about finding the “perfect diet.”
It’s about finding your diet.
And that’s where a dietitian can make all the difference:
Less trial and error
Less unnecessary restriction
More symptom control
Better long-term gut health
References
Lacy BE et al. Bowel disorders. Gastroenterology. 2016.
Staudacher HM, Whelan K. The low FODMAP diet: recent advances. Gut. 2017.
Chey WD et al. ACG clinical guideline: IBS management. Am J Gastroenterol. 2021.
McKenzie YA et al. British Dietetic Association IBS guidelines. J Hum Nutr Diet. 2016.
