But that isn’t always the case for shop-bought mayo. Manufacturers sometimes add thickening agents, emulsifiers, stabilisers and other additional ingredients that are not gluten free.
What’s more, if the mayo or any of the ingredients in it are produced in a facility that also processes wheat or other gluten-containing products, they can become cross-contaminated with gluten. Always look for a mayonnaise with a gluten-free certification or check the ingredients list or with the producer to make sure it is 100% coeliac safe.
Another issue that coeliacs or those with non-coeliac gluten sensitivity should be aware of is cross contamination caused by sharing jars of mayonnaise. If you’re particularly sensitive to gluten, it’s a good idea to keep your own jar of mayo in the fridge for your personal use. That way you won’t have others dipping their gluten-coated knives inside. Another option is to go for mayonnaise in a squeezy bottle.