Allergy Hazelnut test is performed on a sample of blood to measure the level of IgE antibodies in the blood. Also called as, Allergy Hazelnut Fluorescence Assay, it is done to confirm Hazelnut Allergy. This test uses the blood sample to determine if you are allergic to Hazelnut. The lab report produced after the test will give you a detailed analysis and insight regarding the infection, if present.