Restaurants and takeaways across South Yorkshire are now 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.
New legislation was introduced on Saturday and it is hoped consumers will feel more confident when asking about allergenic ingredients when eating out in cafes and restaurants.
Around 2 million people in the UK suffer from allergies including two per cent of adults and eight per cent of children.On average 10 people a year die and around 5,000 are hospitalised.
Chun-Han Chan, from the FSA, said: “With a steady rise in the number of people suffering from food allergies and intolerances in the last decade, these new measures will make it simpler for those with allergies to buy and consume food. Allergies can be fatal for some people and this is why it is vital that food businesses give their customers information they can trust.
“The legislation is a huge step forward for those with allergies, who should now feel confident they have a right to ask about allergenic ingredients in the foods they buy.”