ALEX Allergy Test – Up to 300 Allergies from One Tiny Blood Sample

The ALEX Allergy Test is one of the most advanced blood tests available for allergy diagnosis.
With one small blood sample, it can analyse up to 3oo food and airborne allergens at the same time.

This makes allergy testing faster, more detailed, and far more convenient than traditional testing methods.

What Is the ALEX Allergy Test?

ALEX (Allergy Explorer) is a laboratory blood test that measures specific IgE antibodies to both whole allergens and individual allergen components.

It uses microchip-based ELISA technology, which has replaced older methods such as RAST.
Because of this technology, only a few microlitres of blood are needed to deliver a complete allergy profile.

What makes ALEX different?

– Tests nearly 300 allergen components in one step
– Identifies true allergy vs cross-reactivity
– Covers food, pollen, animals, mites, moulds, venoms, and latex
– Helps guide accurate diagnosis and treatment decisions

Molecular Allergy Testing – The Big Picture

Traditional allergy tests often look at one allergen at a time.
In contrast, the ALEX test provides a molecular-level overview of your allergy sensitisation.

This means it can:
– Distinguish primary allergy from pollen-related cross-reactions
– Identify high-risk proteins linked to severe reactions
– Explain why some foods cause symptoms when raw but not cooked
– Support earlier and more targeted management

As a result, fewer tests are needed, saving time, cost, and clinic visits.

Allergy Testing at Home or in London

Allergy testing is now easier than ever.
There is no need to travel unless you want to see a specialist in person.

Option 1 – Home Testing (UK-wide)

If you live outside London, you can order the test online.
A sample collection pack will be sent to you by post.

Finger-prick sampling is suitable for adults and older children.
Results are returned securely via our clinical health records portal.

Finger-prick sampling is not suitable for babies or very young children.

Option 2 – Clinic Collection (London)

If you prefer, a blood sample can be taken:
– At our adult or paediatric allergy clinics

When Will My Results Be Ready?

Results are usually available within 10–14 days.
We aim for around 10 days wherever possible.

You will receive:
– A detailed laboratory report
– Secure access through our clinical portal

Consultant Interpretation and Treatment

Allergy tests should never be interpreted in isolation.

If you would like:
– Specialist explanation of your results
– Advice on avoidance, medication, or immunotherapy
– A personalised treatment plan

You can book an appointment online with one of our Allergy and Immunology consultants.

Who Is the ALEX Test Suitable For?

The ALEX Allergy Test is helpful for:
– Adults and children with multiple or unclear allergies
– Suspected food allergy or pollen-food syndrome (OAS)
– Eczema, asthma, allergic rhinitis, or urticaria
– Complex or cross-reactive allergy patterns

Book or Order the ALEX Allergy Test

If you are in London

Book an appointment online or call 020 314 33449
Our consultants can assess you and request the test if appropriate.

If you live outside London

Order the ALEX Allergy Test online and receive a home collection kit by post.

If any concerns arise during testing, we will be happy to arrange a specialist consultation.