cereal sulphites

Sulphite Allergy | One of the 14 Major Food Allergens

What are Sulphites?

Sulphites are substances that are found naturally in some foods and drinks. They are also used as an additive to slow browning and discolouration in foods and drinks during the preparation, storage, and distribution processes. They are also used to prevent the growth of bacteria or fungi. Sulphites can be used in food packaging like cling film and are produced naturally in the production of wine and beer. 

Sulphites release sulphur dioxide, an irritant gas, which is why sulphites can cause allergy-like symptoms in those with other health conditions which affect the nose, throat, and mouth. Although an allergy to sulphites is rare, those with underlying asthma are more likely to have allergy-like symptoms from sulphites. Allergy UK states that upwards of 13% of people with asthma also suffer from sulphite sensitivity. Those with urticaria, a type of skin rash, may also experience worsened symptoms after ingesting sulphites.

apricots sulphites

The History of Sulphites

Sulphites were used as preservatives in foods and beverages in the 1970s and 1980s. However, in 1986 the Food and Drug Administration banned them in America due to the increase in severe allergic reactions. The ban stopped the use of sulphites in fresh fruits and vegetables. Nonetheless, they are still permitted within processed meat products, dried fruit, beer, wines and other food and drink products.

While these bans weren’t carried out in the UK, the Food Standards Agency requires that sulphites must be clearly declared in food if present at more than 10ppm (parts per million).

Symptoms of a Sulphite Reaction

Sulphites can cause a reaction when breathing in sulphur dioxide from food or drink consumed that contains sulphites. It can cause asthma and suffer allergy symptoms from wheezing to life-threatening anaphylactic reactions, although this is rare in the case of a sulphite allergy.

Ingredients to avoid if you have a Sulphite allergy:

Labels on food products, medicines, and drinks must state the following substances if sulphites are present over 10ppm: 

  • Sulphur Dioxide (E220)
  • Sodium Sulphite (E221)
  • Sodium Hydrogen Sulphite (E222)
  • Sodium Metabisulphite (E223)
  • Potassium Metabisulphite (E224)
  • Calcium Sulphite (E226)
  • Calcium Hydrogen Sulphite (E227)
  • Potassium Sulphite, also known as Potassium Bisulphite or Potassium Hydrogen Sulphite (E228)

Possible foods and drinks containing sulphites may include:

  • Cereal, cornstarch, crackers, and muesli
  • Dried fruits and vegetables such as raisins, apricots, and sweet potatoes
  • Wine and beer
  • Canned and frozen fruit and vegetables 
  • Fruit jams, jellies, and syrups 
  • Fruit and vegetable juices
  • Vinegars 
  • Condiments such as ketchup, pickles, mustard, as well as others.

This isn’t an exhaustive list but features some of the most common foods to contain the allergen. 

Sulphites and Food Labelling

UK labelling rules also state that sulphur dioxide must be declared if it has purposely been added as a preservative or used in food preparation.

EU food labelling laws require food sold in the UK to include an alert of sulphites or sulphur dioxide on the label if it includes more than 10mg per kg or 10mg per litre.

Businesses that do not follow allergen laws, face serious repercussions, click here to find out more.

LiberEat’s Allergy Detection Technology

LiberEat’s Allergen Detection Technology provides an allergen safety blanket for food businesses. LiberEat offers a second line of defence for food businesses by detecting allergens and other harmful ingredients found in food.

Food businesses can apply this technology directly to identify errors in allergen communications, preventing the risk of injury or loss of life in consumers.

Get in touch with us today to learn more about our Allergen Detection Technology.

To find out how LiberEat Technology supports food businesses to detect allergens and errors, to protect consumers