In the UK celery is listed as a top 14 allergen which needs to be labelled in packaged food.
There are 6 allergens associated with celery allergy - the main allergen in celery is Api g 1 which is similar in shape to the Bet v 1 allergens which can cause oral allergy type symptoms.
Two of the proteins found in celery are lipid transfer proteins, Api g 2 and 6.
You may have Pollen-Food Allergy Syndrome if you suffer from celery allergy with oral allergy symptoms to 3 or more of the foods mentioned in cross reactivity section.
The lipid transfer proteins in celery may cause problems if you suffer from LTP Syndrome.
If sensitised to Birch pollen you may have Pollen Food Allergy Syndrome and may also react to Apple, Kiwi, Pear, Peach, Plum, Nectarine, Apricots, Cherries, Potato, Tomato, Carrot, Parsnip, Pepper, Dill, Cumin, Peas, Coriander, Fennel, Hazelnut, Walnut, Almonds, Peanuts, Lentils and Beans
If sensitised to Alder pollen you may also react to Apple, Cherry, Peach, Pear, Parsley, Celery, Almonds and Hazelnuts.