Tree Nut Allergy Testing
View All TestsWhat Is Tree Nut Allergy?
Tree nut allergy is an IgE-mediated food allergy to one or more tree nuts, including walnut, cashew, hazelnut, almond, pistachio, pecan, Brazil nut, and macadamia. It is distinct from peanut allergy (peanuts are legumes), although some individuals are allergic to both.
Reactions can vary from mild oral symptoms to severe anaphylaxis. Component-resolved testing can help distinguish between primary nut allergy (mediated by seed storage proteins such as 2S albumins and vicilins) and cross-reactive sensitisation from birch pollen (PR-10 proteins), which typically causes milder symptoms.
If you have a known tree nut allergy with a history of severe reactions, always follow your existing emergency action plan.
How Testing Works
Choose Your Test
Select from our range of allergy blood tests and book a convenient time at our South Kensington clinic. No GP referral needed.
Nurse Blood Draw
A qualified nurse takes a small blood sample at our clinic. The appointment is quick and straightforward.
Get Your Results
Results are sent directly to you, typically within a few working days. Share them with your GP or specialist to guide your next steps.
Recommended Tests for Tree Nut Allergy
ALEX² Allergy Test (Venous)
Allergy Profile 1 (Food & Inhalants)
Cashew Components
Hazelnut Components
Profilins
Seed Storage Proteins
Total IgE
Walnut Components
Why Choose a Diagnostic-Only Clinic?
Unlike clinics that provide both testing and treatment, our nurse-led service focuses solely on accurate diagnostic testing. Because we don't offer treatments or prescriptions, there is no commercial incentive to recommend unnecessary tests — just honest, impartial results you can trust.
Nurse-Led & Impartial
Our qualified nurses collect your sample — we don't prescribe, treat, or have any reason to upsell.
Results You Own
Your results are sent directly to you. Take them to your GP or a specialist to discuss what's best for your situation.
You Stay in Control
Understand your allergy profile, then decide with your healthcare professional what steps to take next.
Related Reading
Frequently Asked Questions
If I am allergic to one tree nut, am I allergic to all?
Not necessarily. Some people are allergic to only one tree nut, while others react to several. Component testing can help clarify which nuts you may be sensitised to and whether sensitisation is due to primary allergy or cross-reactivity.
Is coconut a tree nut?
Coconut is classified as a tree nut by the FDA but is botanically a fruit. True allergic cross-reactivity between coconut and other tree nuts is uncommon, though it can occur. Individual testing can clarify your specific sensitivities.
Do I need a GP referral for allergy testing?
No. You can book directly with our clinic without a GP referral. Simply choose your test and select a convenient appointment time. If you're unsure which test is right for your symptoms, our team can help guide your selection.
Do I need to stop taking antihistamines before a blood test?
No. Unlike skin prick testing, IgE blood tests are not affected by antihistamines or other allergy medications. You can continue taking your regular medications before your appointment.
What should I do with my results?
As a diagnostic-only clinic, we provide results directly to you. We recommend sharing them with your GP or allergist for interpretation and dietary management advice.
Get Detailed Tree Nut Allergy Testing
Book a blood test at our South Kensington clinic
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