1 inch round peanut allergen labels featuring an easy to peel sticker that leaves no residue and is used to display that a food contains peanut. As of December 13th, 2014, all packaged and loose foods sold must highlight if they contain any of the fourteen food allergens on the regulatory list. Peanut is often listed as groundnut in ingredient lists and can often be found in cakes, biscuits, sauces and, of course, groundnut oil and peanut flour.