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What are the signs and symptoms?
Pollen food syndrome
Reactions to celery are usually associated with cross reactions with pollen. This means if you have hayfever and developed mild symptoms over time then this may be the most likely cause. Celery is closely linked to birch and mugwort and is often referred to as birch mugwort celery syndrome where the immune system has mistaken the food for pollen. Symptoms are usually mild and can include itching or tingling in the mouth, lips or throat.
Primary celery allergy
Primary celery allergy is not as common but may cause more severe reactions. Symptoms can range from mild reactions such as itching, swelling or hives to anaphylaxis (the more severe form of allergic reaction requiring the use of an adrenaline auto injector).
What food should I avoid?
Celery may appear a simple food to avoid, however, it is hidden in many products and ingredients. Celeriac (Apium graveolens rapaceum) is a root that is closely associated with celery and should also be avoided. As celery is one of the 14 main allergens listed on food packaging in the UK, it is slightly easier to identify on product labels as it will be highlighted in bold or underlined in the ingredient list of a product.
Celery can be eaten raw or cooked from the root, stalk and leaves. Celery seeds can be used in spice mixtures or used as celery salt to flavour food. You will find celery in:
- Stock cubes and gravy granules
- Soups, stews and broths
- Salads, dressings and sauces
- Spice mixes
- Condiments such as marmite
- Tomato juice and smoothies
One study has shown when celery root is heated extensively it still retains its allergenicity and so should be avoided. Furthermore, research has demonstrated that celery spice is allergenic to individuals with an allergy to raw celery despite being dried and powdered for use in spices.
Diagnosing Celery Allergy
If you suspect you have had an allergic reaction to celery it is important to speak with your GP to ensure you have the right management plan and support. Your GP may then refer to an allergy specialist which may include skin prick testing and/or specific IgE blood testing.