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Brazil Nuts

The following information is intended to help people with allergy to Brazil nuts to manage the condition successfully. The information is intended as general guidance.  If you know or believe you are allergic to Brazil nuts, it is important to visit your GP and seek a referral to an allergy clinic even if symptoms have been mild.

General allergy information

Brazil nut allergy is thought to be more common in adults than in children, which may simply reflect the fact that Brazils are not normally eaten by young children. Allergic reactions to Brazil nuts are often severe and have the potential to cause anaphylaxis (the term used for a severe, life-threatening allergic reaction), which includes breathing difficulty.

People with Brazil nut allergy are unlikely to outgrow it. Patients involved in a long-term study on the Isle of Wight did not appear to lose their sensitivity after many years.

Avoiding other nuts

Some people who are allergic to one tree nut, such as Brazil nuts, may be allergic to others, including walnuts or almonds.  There is also the possibility of certain nuts coming into contact with others during food production. So is it best to avoid all nuts if you are allergic to one or two of them?

Some allergy experts would indeed advise that total avoidance is best in order to play safe. But others disagree. One study states: “In peanut or tree nut allergic children, introduction of specific nuts to which the child is not allergic may improve quality of life and should be considered in patients with multiple foods allergies, vegan or ethnic-specific diets, in whom nuts are an important source of protein.”

Our advice is that it depends what tests you have had. If you have been tested for specific nuts, your doctor or allergist will be able to advise whether it is possible to include certain nuts in your diet.  If you do eat specific nuts, it is usually advisable to do so at home so you can better control any risk of cross-contamination.  Eating nuts from the shells avoids the risk of cross-contamination from other nuts.

If you have not been tested for specific nuts, then we believe in playing safe — avoiding all nuts — until you are able to be tested.

Where used

Brazils can be eaten raw and are used in cakes, bread, biscuits, muesli, confectionery and ice cream. Brazil nut butter can be found in supermarkets as well as whole food shops. Brazil nuts are often used to make nut loaf and nut roast.

Nuts are a common feature of Oriental cooking.

Oils

Brazil nut oil should be avoided because it is likely to be unrefined and will therefore contain the proteins that trigger allergic reactions. It can be used for dressing salads and making vinaigrette dressing.

Medicines, soaps, cosmetics and personal care products sometimes contain nut oils.  It is difficult to determine the level of risk posed by these products, so we advise playing safe and avoiding them. Labels may show ingredients in Latin (the Latin name for Brazil nut is Bertholletia excelsa).

Links

Anaphylaxis – The Facts

Allergy to Peanuts and Tree Nuts – The Facts

Adrenaline Factsheet

Reviewers

This article has been reviewed by Dr Gary Stiefel, Consultant in Paediatric Allergy, University Hospitals of Leicester NHS Trust.

Dr Stiefel has no relevant disclosures.

All the information we produce is evidence based or follows expert opinion and is checked by our expert Clinical and research reviewers. If you wish to know the sources we used in producing any of our information products, please let us know, and we will gladly supply details.

Publication date: September 2018

Review date: September 2021

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Anaphylaxis Campaign (incorporating the Latex Allergy Support Group), a charity registered in England and Wales (1085527) and a registered company limited by guarantee in England and Wales (04133242).
Our registered company address is Anaphylaxis Campaign, 1 Alexandra Road, Farnborough, GU14 6BU.