Is Mayo Gluten Free?

Plain mayo's base recipe has no reason to involve gluten at all. So is mayo gluten free across every mainstream brand on a store shelf? For the plain, classic version, essentially yes. Hellmann's Real Mayonnaise carries an explicit gluten-free label, made from soybean oil, water, whole eggs, vinegar, egg yolks, and seasoning. Duke's is made in a dedicated wheat-free facility from soybean oil, eggs, vinegar, and seasoning. Kraft's mayo ingredients are also gluten-free, though the brand doesn't carry a formal gluten-free label the way Hellmann's does - worth knowing if you specifically need a labeled product rather than just gluten-free ingredients.

The exception is flavored varieties: chipotle, garlic-herb, and other flavored mayos can introduce gluten through seasoning blends or thickeners that plain mayo doesn't have. Treat each flavored variant as its own product rather than assuming a brand's plain version covers it.

Plain mayo earns a clean, confident yes here, not a conditional one. The base ingredients - eggs, oil, vinegar or lemon juice - have no structural relationship to gluten, and major brands like Hellmann's back this with an explicit label rather than just an ingredient-list inference. The real risk with mayo isn't the product itself; it's cross-contact from a shared knife, spreader, or squeeze bottle that's touched bread at a deli or sandwich counter. That's a serving-environment risk, not a property of the mayo, which is why this earns a real yes rather than a hedge.

1. Assuming flavored mayo is as safe as plain - chipotle, garlic-herb, and specialty blends can add gluten-containing thickeners. Fix: check flavored varieties individually.
2. Not asking about shared serving utensils at a deli - a spreader or squeeze bottle dipped into for bread sandwiches can cross-contaminate the mayo itself. Fix: ask for a fresh scoop or a sealed portion if you're strict about cross-contact.
3. Assuming store-brand mayo is riskier than name brands - for plain mayo, the ingredient logic is the same regardless of brand or price point, so budget store brands are generally fine. Fix: check the ingredient list, not the price tag.
4. Skipping a formal label check because "it's just eggs and oil" - Kraft's mayo has gluten-free ingredients but isn't formally labeled, so a strict celiac diet may prefer a brand that carries the label explicitly. Fix: choose Hellmann's or a certified brand if you want the formal assurance.