{"id":"ige-brazil-nut","name":"Brazil Nut IgE","shortName":"Brazil nut IgE","aliases":["F018-IgE Brazil Nut","f18","Brazil Nut IgE","Brazil Nut (f18) IgE","f18 IgE","Brazil Nut","Allergen, Food, Brazil Nut","Bertholletia excelsa IgE","ImmunoCAP f18"],"abbreviations":["f18","F018"],"loinc":[{"code":"6050-9","primary":true},{"code":"112147-4","primary":false}],"specimen":"serum","units":[{"ucum":"kU/L","display":"kU/L"}],"referenceRanges":[{"population":"Adults","low":0,"high":0.09,"unit":"kU/L","unitDisplay":"kU/L","note":"Labcorp's sample allergen report prints 'Class 0' as the reference interval, and its class table defines class 0 as under 0.10 kU/L (ARUP also calls under 0.10 'no significant level detected'), so the range is encoded as 0 to 0.09. Other labs set the cutoff higher: ARUP lists a reference interval of 0.34 kU/L or lower for its Brazil nut test, calls 0.10 to 0.34 'clinical relevance undetermined', and adds a Ber e 1 component test when the result is 0.1 kU/L or more. Children's Minnesota Laboratory reports anything under 0.35 kU/L as negative. Thermo Fisher, which makes the ImmunoCAP system, says results of 0.1 kUA/L or more show sensitization, which is not the same as allergy. Results from different labs or test brands are not directly comparable.","sources":[{"title":"Allergen, Food, Brazil Nut With Reflex to Component, IgE (test 3018639)","url":"https://ltd.aruplab.com/Tests/Pub/3018639","publisher":"ARUP Laboratories"},{"title":"Brazil Nut (test 602477)","url":"https://www.labcorp.com/tests/602477/brazil-nut","publisher":"Labcorp"},{"title":"Allergen IgE (laboratory test information)","url":"https://www.childrensmn.org/Manuals/Lab/chemistry/allergen-ige.pdf","publisher":"Children's Minnesota Laboratory"},{"title":"Your quick guide to using ImmunoCAP Specific IgE testing","url":"https://corporate.thermofisher.com/content/dam/phadia/library/en/Quick_guide_to_using_ImmunoCAP_Specific_IgE_testing.pdf","publisher":"Thermo Fisher Scientific (Phadia)","year":2024},{"title":"Allergy Testing in Childhood: Using Allergen-Specific IgE Tests (clinical report)","url":"https://doi.org/10.1542/peds.2011-2382","publisher":"American Academy of Pediatrics (Pediatrics)","year":2012},{"title":"Sample report 607120, Allergens with Component Reflexes Area 20 (class description table)","url":"https://files.labcorp.com/testmenu-d8/sample_reports/607120.pdf","publisher":"Labcorp"}]}],"review":{"status":"ai-verified","label":"AI-verified against cited sources. Awaiting expert review","lastReviewed":"2026-10-03"},"summary":"Measures IgE antibodies to Brazil nut to show whether your immune system has become sensitized to it.","url":"https://bloodtesttracker.com/markers/ige-brazil-nut","notice":"Information, not medical advice. Ranges differ between labs, so the range on your own report is the one your result is judged against."}