Leek is a plant in the Amaryllidaceae family of plants. This family also includes chives, garlic and onion.
Like onions and garlic, leeks contain dially disulphide which can cause contact allergic dermatitis.
Leeks are a high FODMAP food. FODMAP
stands for F
olyols. Foods high in FODMAPs can cause symptoms of food intolerance, affecting the gastro intestinal system and this can be mistaken for a true IgE food allergy.
Leeks are one of the few fresh foods which contain a moderate amount of sulphites
. Sulphites are inorganic salts used in preservations and have the potential to cause symptoms of food intolerance to those sensitive to sulphites, this food intolerance is more common in asthmatics. An improvement in symptoms can be made with a change to a low sulphite diet.
Leeks are low in salicylates
, so are suitable for those who are sensitive to them.
You can read more about Food Intolerances
on the dedicated Food Intolerance Page.
Dially disulphide in leeks can cause contact allergic dermatitis,
Other plants in the Amaryllidaceae
family of plants are garlic, onions and chives. If you suffer from allergic reactions to leeks, you may also react to other plants in this family.
DermNet NZ - Leek
Science Direct - Leek
ATP Science - Salicylate Food List
Anaphylaxis Campaign - Onion and garlic allergy
Articles and Journals
Garlic Allergy, 2023
Recent advances in research on Allium plants: functional ingredients, physiological activities, and applications in agricultural and food sciences, 2022
Immunological characterization of onion (Allium cepa) allergy, 2019
Identification and immunologic characterization of an allergen, alliin lyase, from garlic (Allium sativum), 2004
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