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Gluten-Free at Five Guys, In-N-Out & Wendy's: Fast Food Celiac Guide (2026)

CG
By Sarah Mitchell β˜…β˜…β˜…β˜…β˜… Published May 16, 2026 Β· Last reviewed May 2026

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Three more fast food chains decoded for celiacs. Five Guys has dedicated fry oil, In-N-Out does protein-style, and Wendy's has surprises. Here is your complete ordering guide.

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βœ“Key Takeaways


We already covered McDonald's, Chick-fil-A, Chipotle, and Starbucks. Now let's decode three more chains that celiacs need to know about.


Five Guys β€” ⭐⭐⭐⭐ (Good for Celiacs)


Five Guys is surprisingly celiac-friendly for a burger chain.


βœ… Safe at Five Guys

  • β–ΊBunless Burger β€” Order any burger "in a bowl" or wrapped in lettuce. The beef patties are 100% ground beef with NO fillers or wheat binders. βœ… Naturally GF.
  • β–ΊFries β€” βœ… Five Guys fries are cooked in 100% peanut oil in a dedicated fryer. They only fry potatoes β€” no breaded items go in the fryer. This is the gold standard.
  • β–ΊHot Dogs (no bun) β€” βœ… The hot dogs themselves are GF. Order without the bun.
  • β–ΊAll Toppings β€” βœ… Lettuce, tomato, pickles, onions, mushrooms, jalapeΓ±os, green peppers, ketchup, mustard, mayo, relish, BBQ sauce, hot sauce, A1 sauce β€” all GF.
  • β–ΊMilkshakes β€” βœ… Made from milk, cream, and mix-ins. The base is GF. Avoid any cookie/Oreo mix-ins.

    • ❌ Not Safe

  • β–ΊBuns β€” Wheat-based. Always order bunless.
  • β–ΊGrilled cheese β€” Uses the wheat bun.

    • Five Guys Verdict

    Five Guys is one of the safest fast food options for celiacs. Dedicated peanut oil fryer + no wheat fillers in patties = excellent. Just skip the bun.


    ---


    In-N-Out Burger β€” ⭐⭐⭐ (Decent for Celiacs)


    In-N-Out's "Protein Style" is legendary among celiacs.


    βœ… Safe at In-N-Out

  • β–ΊProtein Style Burger β€” Any burger wrapped in lettuce instead of a bun. The patties are 100% beef, no fillers. βœ… GF.
  • β–ΊFlying Dutchman β€” Two patties with cheese, nothing else. βœ… GF.
  • β–ΊAll toppings β€” Lettuce, tomato, onion (raw or grilled), pickles. βœ… GF.
  • β–ΊSpread β€” βœ… In-N-Out's signature spread is GF.
  • β–ΊShakes β€” βœ… Made from real ice cream and milk. GF.

    • ⚠️ Caution

  • β–ΊFrench Fries β€” In-N-Out fries are cut fresh from whole potatoes and fried in sunflower oil. However, the fryer is shared β€” they also cook peppers in it. No breaded items are fried, but cross-contamination risk exists from the prep environment. Most celiacs tolerate them fine, but it's not a dedicated fryer.

    • ❌ Not Safe

  • β–ΊBuns β€” Wheat. Always order Protein Style.
  • β–ΊGrilled Cheese β€” Uses the wheat bun.

    • In-N-Out Verdict

    Protein Style is a celiac lifesaver on the US West Coast. The fries are lower-risk than most chains but not zero-risk.


    ---


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    Wendy's β€” ⭐⭐ (Limited for Celiacs)


    Wendy's is harder than the others, but doable.


    βœ… Safe at Wendy's

  • β–ΊBunless Burger β€” Beef patties are GF (no fillers). Order without the bun, in a container.
  • β–ΊBaked Potato β€” βœ… Plain baked potato is naturally GF. Top with butter, sour cream, chives, or cheese (all GF). Avoid the chili topping.
  • β–ΊApple Bites β€” βœ… Sealed, naturally GF.
  • β–ΊSide Salad β€” (no croutons) β€” βœ… Lettuce and toppings are GF. Use your own dressing or check their GF options.
  • β–ΊFrosty β€” βœ… The original Chocolate and Vanilla Frosty are labeled GF. However, they're dispensed from a shared machine. Low cross-contamination risk.
  • β–ΊChili β€” ⚠️ Wendy's chili is generally considered GF, but ingredients vary by region. Ask for the allergen binder to verify.

    • ❌ Not Safe

  • β–ΊAll buns β€” Wheat
  • β–ΊChicken Nuggets β€” Breaded with wheat
  • β–ΊChicken Sandwich β€” Breaded
  • β–ΊFrench Fries β€” ⚠️ Wendy's fries are cooked in shared oil with breaded chicken items. NOT safe for celiacs.
  • β–ΊSalad croutons β€” Wheat

    • Wendy's Verdict

    The baked potato is Wendy's celiac MVP. Bunless burger + baked potato + Frosty is a decent meal. But avoid the fries entirely.


    Fast Food Chain Ranking for Celiacs


    RankChainBest ItemDedicated Fryer?
    1ChipotleBurrito BowlNo fryers at all βœ…
    2Five GuysBunless burger + friesβœ… Peanut oil only
    3Chick-fil-AGrilled nuggets + waffle friesβœ… For fries
    4In-N-OutProtein Style⚠️ Shared
    5Wendy'sBaked potato❌ Shared
    6McDonald'sSide salad + apple slices❌ Shared

    Pro tip: Before eating at ANY fast food chain, scan the allergen menu with Check Gluten to verify current ingredients β€” chains reformulate without notice.


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    About the Author

    SM

    Sarah Mitchell

    Lead Content Writer & Nutritionist, B.S. Nutrition Science

    Sarah was diagnosed with celiac disease in 2018 and writes evidence-based guides combining clinical nutrition knowledge with 6+ years of personal gluten-free living experience. All health content is medically reviewed by our advisory team.

    Meet our full team β†’

    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.

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