Restaurants and takeaways across Europe will be required by law to tell customers if their food contains ingredients known to trigger allergies
Staff must provide information on 14 everyday allergens including nuts, milk, celery, gluten, soya and wheat.
The new measures, which come into force on Saturday, cover meals served in bakeries, cafes, care homes and packaged produce sold by supermarkets.
There may be fines for repeat offenders.
According to the European Academy of Allergy, food allergies affect more than 17 million people across Europe.