Harley Street Allergy Clinic – Private Allergy Testing London
At the Harley Street Allergy Clinic in London, we offer comprehensive allergy testing for adults, children and babies. Our specialists use advanced methods including skin prick tests, blood tests (IgE), patch testing and the ALEX® blood test to identify allergies to foods, pollen, dust mites, pet dander and more.
Book an appointment or try our free online allergy screening to see if a home test kit is right for you.
What is Allergy Testing?
Allergy testing helps identify specific allergens causing your symptoms. Tests detect IgE antibodies or skin reactions to allergens such as foods, pollen, mould or animal hair. We also offer intolerance testing for lactose and gluten via genetic analysis.
Our Allergy Tests
- ALEX® Specific IgE Blood Test – screens for 300 allergens from one blood sample. Available as a home test kit or in-clinic.
- Skin Prick Testing – quick, in-clinic test with results in 15–20 minutes.
- Patch Testing – for delayed allergic reactions (e.g., contact dermatitis).
- RAST IgE Testing – single allergen blood testing.
- Provocation Tests – including food, nasal, ocular and drug challenges (clinic only).
- Intolerance Tests – genetic tests for lactose and gluten intolerance.
Who Can Be Tested?
We test all ages – babies, children and adults. Home test kits are available UK-wide. In-clinic appointments are available in London (Harley Street, Central London, West London, South London) and remote Nationwide.
Common Symptoms We Test For
- Rashes, hives, swelling (angioedema)
- Itchy/watery eyes, sneezing, runny nose (hay fever)
- Asthma, wheezing, shortness of breath
- Nausea, vomiting, diarrhoea after eating
- Eczema or dermatitis flare-ups
- Anaphylaxis (severe allergic reaction)
How It Works
- Step 1: Complete our online form for Alex 3 panel test 300 allergens in one go, or choose or choose individual allergens up to 3 per test
- Step 2: Make a payment and receive a home self-collection kit
- Step 3: Return your sample in the post.
- Step 4: Receive your results and a detailed report.
- Step 5: Book a remote appointment with our allergy consultant to discuss your history, results and arrange treatment (additional fee applies).
Is Allergy Testing Safe?
Yes. Tests are safe, painless and suitable for pregnant women and children. Some tests may cause mild itchiness for 15–20 minutes. Severe reactions are rare and managed immediately in-clinic.
Before Your Test
Stop antihistamines 2 days before skin prick testing – but not for blood tests. If you cannot stop medication, inform our team. Home blood tests have no restrictions.
Cost & Insurance
Private allergy testing starts from £42 per allergen (excluding consultation). We are registered with all major private insurers. Contact your insurer before your appointment for pre-authorisation.
FAQs
How long do results take?
Results are usually ready within a few days after your sample reaches the lab.
How often should I be tested?
Children: every 3–5 years. Adults: every 10 years, or as advised by your consultant.
Where can I get tested?
We offer clinics in London and home testing across the UK.
Which test is most accurate?
The ALEX® IgE test is one of the most comprehensive, covering 300 allergens in one go.
Book Your Allergy Test Today
Ready to find out what’s causing your allergies? Register online to book an appointment or order a home test kit.
Harley Street Allergy Clinic – Expert testing, clear results, personalised care.