Flaxseed is harvested from a plant called Linum usitatissimum
, it is in the Linaceae
family of plants.
Flaxseeds can be used crushed to make linseed oil, which is a vegetable oil. The whole flaxseeds can be used in baking and as a health supplement. The leftover product from linseed oil production is used as animal feed.
Lin u 1 is the name of the allegen in flaxseed. This is a 2S seed storage albumin
. These types of proteins are found in many seeds and nuts.
Unrefined linseed or flaxseed oils may have the potential to cause allergic reactions if you suffer from allergies to 2S seed storage proteins. You are less likely to react to refined linseed/flaxseed oils as they are so processed.
In normal low servings flaxseed is a low 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.
Flaxseed is a food low in salicylates. Salicylates
have the potential to cause gastrointestinal food intolerance symptoms in people who are sensitive to salicylates.
Flaxseeds are lectin free. Lectins
are most commonly found in legumes and are another possible cause of food intolerance. Cooking foods with lectins makes them more digestible and can reduce the symptoms of food intolerance.
You can read more about Food Intolerances
on the dedicated Food Intolerance Page.
There are no known syndromes associated with flaxseed allergy at this time.
Other foods containing 2S albumin seed storage proteins are brazil nuts, cashews, peanuts, almonds, mustard seed, rapeseed, turnip, chickpeas, hazelnuts, pistachio, buckwheat, soya beans, sunflower seeds, walnuts, kiwi, castor beans and sesame seeds.
Note that this food list is not exhaustive, the most up to date information is on the Cross Reactivity Tool.
Science Direct - Seed Storage Proteins
Allergen Encyclopedia - Linseed
Allergy information for: Flax seed, linseed (Linum usitatissimum)
Articles and Journals
The physicochemical stability and in vivo gastrointestinal digestion of flaxseed milk: Implication of microwave on flaxseed, 2023
Sunflower (Helianthus annuus) Seed Allergy: A Case Series, 2023
Clinical and immunological characterization of perilla seed allergy in children, 2022
Nutritional management of immediate hypersensitivity to legumes in vegetarians, 2022
Allergic reactions to emerging food allergens in Canadian children, 2021
Seed Storage Proteins, 2S Albumin And 11S Globulin, Associated to Severe Allergic Reactions after Flaxseed Intake, 2021
Severe anaphylaxis with emergent allergy to seeds, 2020
Anaphylaxis Induced by Conlinin, a 2S Storage Protein in Flaxseed, 2018
Case report: A first case of flaxseed-induced anaphylaxis in Korea, 2017
Hypersensitivities to sesame and other common edible seeds, 2016
Case report: anaphylaxis caused by linseed included in baked bread, 2014
Flax seed allergy in children: an emerging allergen? 2010
2S Albumin Storage Proteins: What Makes them Food Allergens? 2008
Anaphylaxis to Linum, 2003
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