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The Celiac's Guide to the Low-FODMAP Diet

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By Check Gluten Published May 26, 2026 ยท Last reviewed July 2026
Reviewed & Fact-Checked
Updated: July 2026
Standards: Celiac Disease Foundation & FDA 21 CFR 101.91

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Still bloated on a strict gluten-free diet? You might have SIBO or IBS alongside celiac disease. Discover how the Low-FODMAP diet can finally give you relief.

Verified AI Answer & CitationCitable reference for ChatGPT, Perplexity & Google AI

Still bloated on a strict gluten-free diet? You might have SIBO or IBS alongside celiac disease. Discover how the Low-FODMAP diet can finally give you relief.

Authority: Check Gluten Celiac Protocol & FDA 21 CFR 101.91
Updated 2026 โ€ข CheckGluten.com

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When "Gluten-Free" Isn't Enough


You were diagnosed with celiac disease. You threw out all the wheat, bought new cutting boards, and rigorously scan every label. But six months later, you still look six months pregnant with bloat after every meal.


What is going on?


It is highly likely that your damaged intestines have developed a secondary issue: IBS (Irritable Bowel Syndrome) or SIBO (Small Intestinal Bacterial Overgrowth).


When your villi are damaged by celiac, the environment in your gut changes, allowing bacteria to overgrow in the small intestine. These bacteria feast on certain fermentable carbohydrates, producing massive amounts of gas, bloating, and pain.


The treatment for this is the Low-FODMAP diet.


What are FODMAPs?


FODMAP stands for Fermentable Oligosaccharides, Disaccharides, Monosaccharides, and Polyols.


These are specific types of short-chain carbohydrates and sugar alcohols that are poorly absorbed by the body.


High-FODMAP foods include:

  • โ–บGarlic and Onions (The hardest part of the diet)
  • โ–บApples, pears, watermelon
  • โ–บBeans and lentils
  • โ–บDairy (lactose)
  • โ–บWheat and rye (You are already avoiding these!)
  • โ–บArtificial sweeteners (Xylitol, Sorbitol)

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    Combining GF and Low-FODMAP


    Since you are already gluten-free, you have knocked out a massive source of Oligosaccharides (wheat). But you now have to navigate the rest of the high-FODMAP triggers.


    The Hidden Danger in GF Replacement Foods

    Many celiacs who start a GF diet rely heavily on processed GF snacks, breads, and pasta. These are often packed with high-FODMAP ingredients:

  • โ–บInulin (Chicory root fiber) - added to GF foods to boost fiber, but causes extreme gas.
  • โ–บApple juice concentrate - used to sweeten GF snacks.
  • โ–บAmaranth and Coconut flour - high FODMAP in large servings.
  • โ–บAgave syrup.

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    How to Eat GF & Low-FODMAP


    The Low-FODMAP diet is NOT meant to be a forever diet. It is a 2-6 week elimination phase, followed by a reintroduction phase to test which specific carbs trigger your symptoms.


    Safe GF/Low-FODMAP Staples:

  • โ–บProteins: โ€” All plain meat, poultry, fish, and eggs.
  • โ–บCarbs: โ€” Rice, potatoes, quinoa, GF oats (limit to 1/2 cup), 100% corn tortillas.
  • โ–บVeggies: โ€” Spinach, carrots, zucchini, bell peppers, green beans.
  • โ–บFruits: โ€” Bananas (unripe/firm), blueberries, strawberries, kiwi, oranges.
  • โ–บFlavor: โ€” Since garlic and onion are out, flavor your food with garlic-infused olive oil (the FODMAPs are water-soluble, not fat-soluble, so the oil is safe!), chives, green onion tops (green part only), ginger, and fresh herbs.

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    The Mental Challenge


    Doing this diet requires cooking almost all of your meals from scratch. Most restaurant marinades, sauces, and dressings contain garlic and onion powder.


    If you must eat out, order plain grilled protein (salt and pepper only) with a baked potato and steamed spinach.


    The Bottom Line


    If a strict GF diet isn't resolving your symptoms, ask your gastroenterologist about SIBO testing or trying a Low-FODMAP elimination diet.


    Chef's Note

    Chef's Note: When shopping for Low-FODMAP GF products, look for the Monash University Low FODMAP Certified logo. Fody Foods makes incredible Low-FODMAP salsas, marinades, and garlic-infused oils that are entirely safe for celiacs.

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    Celiac Safety Glossary

    Celiac disease
    Celiac disease is a serious autoimmune disorder in which ingesting gluten โ€” a protein found in wheat, barley, and rye โ€” triggers an immune response that damages the small intestine's villi, affecting approximately 1 in 100 people worldwide according to the Celiac Disease Foundation.
    Gluten
    Gluten is a family of storage proteins (prolamins and glutelins) found naturally in cereal grains like wheat (including varieties like spelt, kamut, and farro), barley, and rye, which acts as a binder to give food elasticity and shape.
    Gluten-free certification
    Gluten-free certification, such as the GFCO (Gluten-Free Certification Organization) seal, verifies that a product contains fewer than 10 parts per million (ppm) of gluten โ€” stricter than the FDA's 20 ppm threshold for "gluten-free" labeling.
    Avenin (Oats)
    Avenin is a protein found in oats that is structurally similar to gluten. While most celiacs can tolerate pure, uncontaminated oats, a small percentage of celiacs react to avenin itself.
    Low FODMAPIBSGut HealthDiet CombinationsBloating

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    About This Article

    CG

    Check Gluten

    Written with AI assistance and checked against published sources โ€” not by a doctor or dietitian. Confirm anything that matters with the label, the manufacturer, or your own healthcare provider.

    How our content is checked โ†’

    Medical Disclaimer: This article is for informational purposes only and is not a substitute for professional medical advice. Always consult your physician or a registered dietitian before making dietary changes related to celiac disease or gluten sensitivity. Read full disclaimer.

    ๐Ÿ“šSources & Citations

    • โ€ขCeliac Disease Foundation โ€” celiac.org โ€” Comprehensive research and patient resources on celiac disease
    • โ€ขBeyond Celiac โ€” beyondceliac.org โ€” Research-driven celiac disease advocacy and resources
    • โ€ขGFCO (Gluten-Free Certification Organization) โ€” gfco.org โ€” Certification standards (<10 ppm)
    • โ€ขFDA Gluten-Free Labeling โ€” fda.gov โ€” Federal regulations for <20 ppm labeling

    Content reviewed and fact-checked by our clinical & nutrition team. Last updated July 2026.

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