Hazelnut (Filbert) Allergy Test
This page explains the hazelnut (filbert) allergy test, what it measures, and how to arrange it. The hazelnut (filbert) allergy test is a blood test that checks for an allergic response to hazelnut proteins. It is often ordered when a person has had symptoms like hives, itching, or breathing trouble after eating hazelnuts, or when a clinician needs to confirm or rule out a hazelnut allergy.
- Sample type
- blood
- Category
- Allergy
- Turnaround
- 1-3 business days
- Price
- $49
- Referral
- Not required
The hazelnut (filbert) allergy test is a blood test that checks for an allergic response to hazelnut proteins. It is often ordered when a person has had symptoms like hives, itching, or breathing trouble after eating hazelnuts, or when a clinician needs to confirm or rule out a hazelnut allergy.
What it measures
- Hazelnut-specific IgE antibodies — The main marker; it measures antibodies your immune system may make against hazelnut proteins.
- Total IgE — A general allergy antibody level that can help put the specific result in context.
- Other tree nut-specific IgE — Sometimes tested together to see if reactions may involve other nuts.
Who it is for
A clinician such as an allergist, primary care doctor, or pediatrician typically orders this test after a suspected reaction or when evaluating ongoing allergy symptoms.
Preparation
No fasting or special preparation is needed. The blood sample can be collected at any time of day.
Results and what they mean
Results are usually reported as a number for hazelnut-specific IgE, often with a reference range or class score. A clinician interprets the result along with your symptoms and history; a positive test alone does not always mean a true allergy. This is general information, not medical advice.
How to order this test
- Choose the test and place a confidential order online.
- Select a certified collection site and pick a time that suits you.
- Have your specimen collected — most draws take only a few minutes.
- Review results in a secure portal, typically within 1–3 days.
Preparation, hours, and pricing vary by site; confirm details directly with the lab before your visit.
Availability by state
Direct-access online ordering for the hazelnut (filbert) allergy test is available in most states. It is currently unavailable in 6 states:
Everywhere else you can order confidentially and collect your sample at a certified site. Browse by state →
Frequently asked questions
Does a positive result mean I am definitely allergic to hazelnuts?
Not always. A positive result shows that your immune system has made antibodies to hazelnut, but only a clinician can determine whether you have a true allergy based on your symptoms and history.
Can I eat hazelnuts before this test?
Yes, no fasting is required. However, if you have had a severe reaction, follow your clinician's advice about avoiding hazelnuts before testing.
How long does it take to get results?
Results are typically available within 1 to 3 business days after the blood sample is collected.
Is this test painful?
It is a standard blood draw, so you may feel a brief pinch when the needle goes in. The collection itself takes only a few minutes.