Brazil Nut Allergy Test in California

What this test measures

Brazil nuts come from a large tree native to the Amazon region, and they are eaten on their own or used in mixes and baked goods. Tree nut allergies are among the more persistent food allergies, and reactions can range from mild oral itching to hives, digestive symptoms, and, in some people, a serious reaction. Brazil nut is one of several tree nuts that can trigger symptoms.

The test measures allergen-specific IgE in serum using a laboratory immunoassay. A single blood sample is collected, and the laboratory reports the antibody level along with a reactivity class. Tree nuts share some proteins, but each nut also has unique allergens, so clinicians often look at several nut results together rather than assuming that reactivity to one means reactivity to all.

A positive result shows sensitization, not necessarily a clinical allergy. Some people have antibodies without symptoms, and the severity of a reaction cannot be predicted from the antibody level alone. A qualified healthcare provider interprets the finding with your history. Anyone who has had breathing trouble, throat swelling, or fainting after eating tree nuts should seek emergency care.