Traditional mayonnaise is gluten-free. The core ingredients in mayo, eggs, oil, vinegar, and lemon juice, do not contain gluten. Most major brands, including Hellmann’s (Best Foods), Duke’s, and Heinz, label their standard mayonnaise as gluten-free. That said, a few situations can introduce gluten into mayo, and they’re worth knowing about if you have celiac disease or a gluten sensitivity.
Why Basic Mayo Is Naturally Gluten-Free
Mayonnaise is an emulsion of oil and egg yolks, stabilized with an acid like vinegar or lemon juice. Sometimes mustard or mustard seed is added. None of these ingredients contain gluten proteins, which are found in wheat, barley, and rye. This means a simple, homemade mayo made from scratch is inherently safe for a gluten-free diet.
Ingredients That Could Add Gluten
Plain mayo is straightforward, but flavored varieties or store brands sometimes include extra ingredients that deserve a closer look.
Modified food starch: This thickener is usually derived from corn or potato, both gluten-free. If wheat is used instead, federal law (the Food Allergen Labeling and Consumer Protection Act) requires it to be listed on the label. So check the ingredients panel, but don’t assume modified food starch is a problem.
Malt vinegar: Most vinegars used in mayo, including distilled white vinegar, apple cider vinegar, and wine vinegar, are gluten-free. Even distilled vinegar made from gluten-containing grains is safe because the distillation process removes gluten. The exception is malt vinegar, which is typically made from barley and is not distilled. Malt vinegar is not safe for people with celiac disease. It’s uncommon in standard mayo but can show up in specialty or flavored versions.
Flavored and specialty mayos: Chipotle mayo, garlic aioli, sriracha mayo, and similar products sometimes contain seasonings, sauces, or flavor bases with wheat or barley. Hellmann’s labels its Real Mayonnaise, Light Mayonnaise, and Low-Fat Mayonnaise Dressing as gluten-free, but notes that other flavored varieties are not. Always check the specific product rather than assuming the whole brand line is safe.
What About Vegan Mayo?
Plant-based mayonnaise replaces eggs with other emulsifiers and thickeners. These might include pea protein, soy protein, or various starches. The same rules apply: none of these are inherently gluten-containing, but the specific formulation matters. Look for a “gluten-free” label on the jar, and scan the ingredients for wheat-based starches or flavorings.
Brands With Gluten-Free Labeling
Several widely available brands explicitly label their mayo gluten-free:
- Hellmann’s / Best Foods: The same product sold under two names (Hellmann’s east of the Rockies, Best Foods in the west). Their Real Mayonnaise carries a gluten-free label, and the company reports its vinegar is derived from corn.
- Duke’s: Made with soybean oil, egg yolks, and distilled and cider vinegar. Listed as gluten-free and kosher certified.
- Heinz: Also uses non-gluten-grain vinegar and labels its standard mayo gluten-free.
The FDA defines “gluten-free” on food labels as containing fewer than 20 parts per million of gluten. This is a voluntary claim, meaning brands aren’t required to put it on the label, but when they do, they must meet that threshold. If a jar doesn’t say “gluten-free,” it doesn’t necessarily contain gluten. It may just mean the manufacturer hasn’t pursued the labeling. Reading the full ingredients list is your most reliable tool.
Cross-Contamination at Home
Even a certified gluten-free mayo can pick up gluten from your kitchen. The most common culprit: dipping a knife into the mayo jar after it’s touched bread. Over time, crumbs accumulate in shared condiment jars, introducing enough gluten to trigger symptoms in someone with celiac disease.
A few simple fixes make a real difference. Squeeze bottles eliminate the knife-dipping problem entirely. If you use jars, keep a separate one labeled for gluten-free use only. You can also scoop mayo onto a clean plate first, then spread from there, so the jar stays uncontaminated.
How to Check Any Mayo Quickly
You don’t need to memorize safe brands. Three quick steps work for any jar on any shelf:
- Look for “gluten-free” on the label. If it’s there, the product meets the FDA’s under-20-ppm standard.
- Scan for wheat in the allergen statement. Federal law requires wheat to be called out in bold or in a “Contains” line below the ingredients.
- Check the vinegar type. Distilled, apple cider, and wine vinegars are safe. Malt vinegar is not.
If the ingredients list is short and familiar (oil, eggs, vinegar, salt, maybe mustard), you’re almost certainly fine. The risk rises with longer ingredient lists, flavored varieties, and imported products that may not follow U.S. labeling rules.