Lab test
Hazelnut (Filbert) Allergy Test - Nuts
A hazelnut allergy test, also called a filbert allergy test, uses a blood sample to measure allergen-specific IgE antibodies against hazelnut proteins.
- Typical price
- From $49
- Results
- 1-3 business days
- Preparation
- See preparation notes below
- Sample
- Blood draw or sample collection at a local center
About this test
A hazelnut allergy test, also called a filbert allergy test, uses a blood sample to measure allergen-specific IgE antibodies against hazelnut proteins. Hazelnut is a tree nut and a common trigger of food allergy symptoms. Because hazelnut shares proteins with birch pollen, some people react to hazelnut as part of pollen-related food sensitivity. A provider may order the test after a reaction to hazelnuts or nut spreads, or as part of a broader tree nut panel. It is a screening tool and is interpreted with symptoms and history.
What this test measures
- Hazelnut-specific IgE Antibodies produced against hazelnut (filbert) proteins; used to assess sensitization to hazelnut.
Who this test may be right for
- People who develop hives, itching, or swelling after eating hazelnuts
- Individuals with tingling or itching in the mouth after hazelnut or nut spreads
- Those with digestive upset, vomiting, or diarrhea after tree nuts
- People with eczema or skin reactions who suspect a tree nut trigger
- Anyone with a history of birch pollen allergy and reactions to hazelnut
Before your visit
- No fasting is required for this IgE allergy test
- The blood sample can be collected at any time of day
- Tell the provider about medications such as antihistamines
- No special diet is needed beforehand
Understanding your results
Results are reported as an IgE level or class for hazelnut. An elevated value may indicate sensitization, but sensitization does not always mean a person will react when eating hazelnuts. A low or undetectable level makes a true allergy less likely, though it does not completely rule one out. Hazelnut proteins can cross-react with birch pollen, so a provider may consider pollen-related food sensitivity. Discuss results with a healthcare provider before removing tree nuts from your diet.
Order this test online
- Buy online in a few minutes - no doctor's visit needed for most tests.
- Sample collection at a patient service center near you.
- Results are typically ready within 1-3 business days.
- Secure, lab-reviewed results delivered to your account.
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Questions people ask
Is filbert the same as hazelnut?
Yes. Filbert is another name for hazelnut. The hazelnut-specific IgE test measures antibodies against the same nut proteins under either name.
Can hazelnut allergy be linked to pollen?
It can. Hazelnut shares proteins with birch pollen, so some people with pollen allergy react to hazelnut through cross-reactivity. A healthcare provider can interpret your hazelnut-specific IgE result in that context.
Do I need to fast before this test?
No. The hazelnut-specific IgE test requires no fasting or special preparation and can be collected at any time.
Does a positive result mean I must avoid all nuts?
Not necessarily. A positive hazelnut-specific IgE result indicates sensitization to hazelnut and does not by itself apply to other tree nuts. A healthcare provider can advise on which foods to avoid.
What does the Hazelnut (Filbert) Allergy Test - Nuts measure?
This IgE allergy test uses a blood sample to determine if you are allergic to hazelnuts (also known as filberts).
How long do results take?
Most Hazelnut (Filbert) Allergy Test - Nuts results are released in 1-3 business days. Specialty testing can take longer.
Is this test right for me?
This page is educational and not medical advice. Talk to a licensed healthcare provider about which tests fit your situation.
LabBookings is an independent directory. We compare test details and pricing information, but we are not a laboratory and we do not perform testing or provide medical advice. Always talk to a licensed healthcare provider about your results and treatment.
Laboratory services are provided by independent, CLIA-certified testing partners. Availability, pricing, and turnaround times can vary by location and are confirmed at checkout.