{"id":"ige-peanut","name":"Peanut IgE","shortName":"Peanut IgE","aliases":["F013-IgE Peanut","f13","Peanut (f13) IgE","f13 IgE","Peanut IgE","Peanut, IgE","Peanut, IgE, Serum","Peanut Specific IgE","Allergen, Food, Peanut","Allergen, Food, Peanut IgE","Arachis hypogaea IgE","Groundnut IgE","ImmunoCAP f13","IgE Peanut","Peanut (f013) IgE"],"abbreviations":["f13","f013"],"loinc":[{"code":"6206-7","primary":true},{"code":"112151-6","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":"Most labs print a result under 0.10 kU/L as negative (class 0). Mayo Clinic Laboratories lists 0.10 to 0.34 kU/L as borderline or equivocal and flags 0.70 and above, with the same values at all ages. ARUP Laboratories calls 0.10 to 0.34 kU/L 'clinical relevance undetermined' and says those results are intended for specialist use. The ImmunoCAP maker suggests a 0.35 kUA/L cutoff and tells each lab to set its own range. For peanut, studies have placed the level that goes with true allergy at different points, for example a published 95% positive predictive value of 15 kUA/L (Dang 2012), and these points do not transfer between labs or test brands. In studies, IgE to single peanut proteins such as Ara h 2 separated allergy from tolerance better than whole-peanut IgE (Klemans 2015), while isolated IgE to Ara h 8 usually went with tolerance (Asarnoj 2012). A result above these lines means sensitization, which is not the same as an allergy.","sources":[{"title":"Peanut, IgE, Serum (test ID PEAN)","url":"https://www.mayocliniclabs.com/test-catalog/overview/82888","publisher":"Mayo Clinic Laboratories"},{"title":"Peanut, IgE with Reflex to Peanut Components, IgE, Serum (test ID PEANT)","url":"https://www.mayocliniclabs.com/test-catalog/overview/64756","publisher":"Mayo Clinic Laboratories"},{"title":"Allergen, Food, Peanut (ARUP test 0055024)","url":"https://ltd.aruplab.com/Tests/Pub/0055024","publisher":"ARUP Laboratories"},{"title":"510(k) Decision Memorandum K173726: ImmunoCAP Specific IgE (ImmunoCAP Allergen f447, rAra h 6, Peanut)","url":"https://www.accessdata.fda.gov/cdrh_docs/reviews/K173726.pdf","publisher":"U.S. Food and Drug Administration","year":2018},{"title":"Guidelines for the diagnosis and management of food allergy in the United States: report of the NIAID-sponsored expert panel","url":"https://pmc.ncbi.nlm.nih.gov/articles/PMC4241964/","publisher":"Journal of Allergy and Clinical Immunology","year":2010},{"title":"Increasing the accuracy of peanut allergy diagnosis by using Ara h 2","url":"https://pubmed.ncbi.nlm.nih.gov/22385632/","publisher":"Journal of Allergy and Clinical Immunology","year":2012},{"title":"Diagnostic accuracy of specific IgE to components in diagnosing peanut allergy: a systematic review","url":"https://pubmed.ncbi.nlm.nih.gov/25226880/","publisher":"Clinical & Experimental Allergy","year":2015},{"title":"Peanut component Ara h 8 sensitization and tolerance to peanut","url":"https://pubmed.ncbi.nlm.nih.gov/22738678/","publisher":"Journal of Allergy and Clinical Immunology","year":2012},{"title":"Allergy Blood Test","url":"https://medlineplus.gov/lab-tests/allergy-blood-test/","publisher":"MedlinePlus, National Library of Medicine"}]}],"review":{"status":"ai-verified","label":"AI-verified against cited sources. Awaiting expert review","lastReviewed":"2026-10-03"},"summary":"Measures IgE antibodies to whole peanut in your blood. A detectable result means you are sensitized to peanut, which is not the same as a peanut allergy.","url":"https://bloodtesttracker.com/markers/ige-peanut","notice":"Information, not medical advice. Ranges differ between labs, so the range on your own report is the one your result is judged against."}