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Low FODMAP Guide
A short-term, three-phase eating plan that calms the gut by temporarily cutting fermentable carbs (FODMAPs) — then reintroduces them to pinpoint your personal triggers. The most evidence-based way to manage IBS.
Lauren Manaker, MS, RDN, LD, CLEC, CPT
All content here is reviewed by a certified Registered Dietitian & Nutrition Consultant with 20+ years of clinical nutrition experience.
Lauren Manaker, MS, RDN, LD, CLEC, CPT
All content here is reviewed by a certified Registered Dietitian & Nutrition Consultant with 20+ years of clinical nutrition experience.
What Is the Low FODMAP Diet?
Low FODMAP Recipes
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The Four FODMAP Groups
Good to know: It’s about lowering your total FODMAP load — portion size matters, and many foods are fine in small amounts.
Oligosaccharides
Chains of sugars (fructans and galacto-oligosaccharides) that no one fully digests — they ferment in the colon and are the single most common IBS trigger.
Common sources
- Wheat, rye & barley
- Onion, garlic & leek
- Legumes, chickpeas & lentils
- Cashews & pistachios
What Are the Benefits of a Low FODMAP Diet?
Less Bloating
Cutting fermentable carbs means less gas and water drawn into the gut, so the bloating and visible distension many people with IBS feel can ease within weeks.
Less Pain & Cramping
Abdominal pain is one of the symptoms that improves most in trials, as fewer FODMAPs reach the colon to ferment and stretch the gut wall.
Steadier Bowel Habits
Many people find diarrhea, constipation, and urgency settle into a calmer, more predictable rhythm.
Evidence-Based for IBS
It is the most-studied dietary therapy for IBS, with around 3 in 4 people responding during the elimination phase in controlled trials.
Know Your Triggers
Structured reintroduction reveals exactly which FODMAP groups — and what portions — your gut can handle, so you can stop guessing.
A Varied Diet, Long-Term
The goal is freedom, not restriction: personalization lets you eat the widest possible range of foods while keeping symptoms in check.
What to Eat on a Low FODMAP Diet
Low-FODMAP Vegetables
Carrots, cucumber, zucchini, bell pepper, spinach, green beans, eggplant, and potatoes.
Low-FODMAP Fruit
Strawberries, grapes, oranges, kiwi, pineapple, and cantaloupe in standard portions.
Grains
Rice, oats, quinoa, corn, and certified gluten-free or sourdough spelt bread.
Protein
Plain-cooked chicken, fish, eggs, and firm tofu are naturally FODMAP-free.
Lactose-Free Dairy
Lactose-free milk and yogurt, plus hard cheeses like cheddar, brie, and feta.
Nuts & Seeds
Walnuts, macadamias, peanuts, and pumpkin seeds in small handfuls.
Could Low FODMAP Help You?
Only a few of these sound like you. Your discomfort may have another cause — but if symptoms persist or worsen, check in with your doctor.
Tips for Success on a Low FODMAP Diet
Use Garlic-Infused Oil
Fructans don’t dissolve into oil, so garlic- and onion-infused oils give you the flavor without the trigger — a staple of the elimination phase.
Read Every Label
FODMAPs hide in sauces, breads, and snacks as onion, garlic, honey, inulin, and high-fructose corn syrup. Check ingredient lists carefully.
Mind Your Portions
Many foods are low FODMAP only in small servings. A few nuts or half an avocado is fine; a big bowl tips into high-FODMAP territory.
Keep a Symptom Diary
Track what you eat and how you feel each day. It makes the reintroduction phase far more accurate when you test foods later.
Don’t Rush Reintroduction
Once symptoms settle, test one FODMAP group at a time over a few days. Going too fast makes it impossible to know your real triggers.
The Three Phases
Elimination
For 2–6 weeks, cut out all high-FODMAP foods to settle your symptoms. If you respond, you’ll usually feel noticeably better by the end.
Reintroduction
Once symptoms ease, test one FODMAP group at a time over a few days — keeping the rest low — to see which ones, and how much, you can tolerate.
Personalization
Build your long-term diet: keep only the foods that trigger you limited, and enjoy everything else. The aim is the most variety you can comfortably eat.
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Common Low FODMAP Questions
Check out these answers to common questions and review other information in the
Disclaimer: This content is for general informational and educational purposes only and is not intended as medical advice. The low FODMAP diet is a short-term, restrictive protocol best undertaken with a physician or registered dietitian, especially if you are pregnant, nursing, have a medical condition, or have a history of disordered eating. Always consult a qualified healthcare professional before starting.