BRAZIL NUT ALLERGY
Key Allergens
Brazil Nuts are classified as tree nuts and are in the top 14 allergens which have to be declared on food packaging in Europe. There are 2 allergens involved in allergy to brazil nuts.
Ber e 1 is a 2S albumin seed storage protein and is considered to be the main allergen linked to allergic reactions. This is why most nuts are grouped together for the purpose of labelling as sufferers of this allergy are most often allergic to multiple types of tree nuts, peanuts and seeds.
Ber e 2 is an 11S globulin seed storage protein. These are often also referred to as legumins.
Ber e 1 is a 2S albumin seed storage protein and is considered to be the main allergen linked to allergic reactions. This is why most nuts are grouped together for the purpose of labelling as sufferers of this allergy are most often allergic to multiple types of tree nuts, peanuts and seeds.
Ber e 2 is an 11S globulin seed storage protein. These are often also referred to as legumins.
Associated Syndromes
Brazil Nut allergy is not currently associated with any allergic syndromes.
Cross Reactivity
Other food containing 2S albumin seed storage proteins are cashews, peanuts, almonds, mustard seed, rapeseed, turnip, chickpeas, hazelnuts, pistachio, buckwheat, soya beans, sunflower seeds, walnuts, kiwi, castor beans and sesame seeds.
There is a lot of cross reactivity between 2S and 11S seed storage proteins, the only other food containing 11S proteins not mentioned above is pumpkin.
There is a lot of cross reactivity between 2S and 11S seed storage proteins, the only other food containing 11S proteins not mentioned above is pumpkin.
Resources
Websites
Allergen Encyclopedia - Brazil Nuts
What Are the Symptoms of a Nut Allergy?
Allergy UK - Quick Guide to Tree Nut Allergy
Anaphylaxis Campaign - Peanut and Tree nut allergies
Can You Be Allergic to Just One Type of Tree Nut?
Anaphylaxis Campaign - Brazil Nuts
Allergy information for: Brazil nut (Bertholletia excelsa )
Articles and Journals
Prevalence and early-life risk factors for tree nut sensitization and allergy in young adults, 2021
Current perspectives on tree nut allergy: a review, 2018
2S Albumin Storage Proteins: What Makes them Food Allergens? 2008
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