Conform to food allergen labelling legislation with these 1 inch round celery allergen stickers, featuring an easy to peel adhesive that leaves no residue. It is important for people with allergies to know what is contained within their food and on December 13th, 2014, it became legislation to not only list all ingredients in a product, but to also highlight any of the fourteen allergens contained within the regulatory list. Celery can be found in celery salt, soups, stock cubes and salads.