ALEX3 Allergy Testing in Surbiton — 300 Allergens from One Blood Test

What is the ALEX3 Allergy Test?

ALEX3 (Allergy Explorer 3) represents the most advanced comprehensive allergy testing technology available today. Unlike traditional allergy tests that screen a limited number of allergens, ALEX3 tests for an extraordinary 300 allergens — including 218 molecular allergen components — from a single blood sample.

This revolutionary test doesn't just tell you what you're allergic to; it identifies the specific proteins causing your reactions. This molecular-level insight is crucial for understanding the severity of your allergies, predicting cross-reactions between different allergens, and developing an effective management strategy.

At Lambert Medical Practice, we're proud to offer ALEX3 testing as part of our commitment to providing cutting-edge diagnostics to patients in Surbiton, Tolworth, Kingston, and the wider Surrey area.

How ALEX3 Differs from Standard Allergy Tests

Traditional allergy testing methods have significant limitations that ALEX3 overcomes:

Skin Prick Tests

Skin prick tests are commonly used but only test 20-40 allergens at a time. They require you to stop taking antihistamines for several days beforehand, can be uncomfortable, and cannot distinguish between true allergies and cross-reactive responses. Results can be affected by skin conditions and medication use.

Standard Blood Tests (Specific IgE)

Traditional blood allergy tests measure IgE antibodies to whole allergen extracts. While more comprehensive than skin prick tests, they still miss the molecular detail that determines allergy severity and cross-reactivity patterns.

The ALEX3 Advantage

ALEX3 uses microarray technology to test 300 allergens simultaneously, including both whole allergen extracts and individual molecular components. This provides:

• Component-Resolved Diagnostics: Identifies the exact protein molecules causing your allergic reactions
• Cross-Reactivity Mapping: Explains why you might react to multiple foods or environmental allergens
• Risk Stratification: Helps predict the likely severity of allergic reactions
• Immunotherapy Guidance: Provides information needed to assess suitability for desensitisation treatments

What Allergens Does ALEX3 Test For?

ALEX3 provides comprehensive coverage across all major allergen categories:

Food Allergens

ALEX3 tests for an extensive range of food allergens, helping identify both primary sensitisations and cross-reactive patterns:

• Nuts: Peanut, tree nuts (almond, hazelnut, walnut, cashew, pistachio, Brazil nut, macadamia, pecan)
• Dairy: Cow's milk proteins (casein, whey), goat's milk, sheep's milk
• Eggs: Egg white, egg yolk (raw and cooked proteins)
• Seafood: Fish (cod, salmon, tuna, mackerel), shellfish (shrimp, crab, lobster, mussel, oyster, squid)
• Wheat & Grains: Wheat, gluten, rye, barley, oats, rice, corn, buckwheat
• Fruits: Apple, peach, kiwi, banana, melon, strawberry, citrus fruits, tropical fruits
• Vegetables: Celery, carrot, tomato, potato, soy, legumes, lentils
• Seeds: Sesame, sunflower, poppy, mustard
• Spices: Various culinary spices and herbs

Environmental Allergens

Comprehensive testing for airborne and environmental allergens:

• Pollens: Grass pollens, tree pollens (birch, oak, alder, hazel, olive), weed pollens (ragweed, mugwort, plantain)
• House Dust Mites: Dermatophagoides pteronyssinus, Dermatophagoides farinae, storage mites
• Moulds: Alternaria, Aspergillus, Cladosporium, Penicillium
• Animal Dander: Cat, dog, horse, guinea pig, hamster, rabbit, mouse, rat
• Cockroach: German cockroach allergens

Insect Venom Allergens

Important for assessing anaphylaxis risk from insect stings:

• Honeybee venom
• Wasp venom (common wasp and paper wasp)
• Hornet venom

Latex & Other Allergens

• Natural rubber latex (Hevea brasiliensis)
• Anisakis (fish parasite — important for raw fish consumers)

Understanding Molecular Allergy Testing

The power of ALEX3 lies in its ability to identify specific allergenic molecules (components) rather than just whole allergen extracts. Here's why this matters:

Primary vs Cross-Reactive Allergies

When you react to a food or environmental allergen, it might be due to a primary sensitisation (a genuine allergy to that specific source) or a cross-reaction (where similar proteins in different allergens cause reactions).

For example, many people with birch pollen allergy also react to apples, peaches, and hazelnuts. This is because these foods contain proteins similar to the main birch pollen allergen (Bet v 1). These cross-reactive proteins are typically heat-labile, meaning cooked versions of these foods may be tolerated.

Clinical Significance

Different molecular components predict different risks:

• Storage proteins (like peanut Ara h 2) are associated with severe systemic reactions
• PR-10 proteins (like apple Mal d 1) typically cause milder oral symptoms
• Lipid Transfer Proteins (LTPs) can cause severe reactions and are heat-stable

ALEX3 identifies which components you're sensitised to, helping your doctor predict reaction severity and advise on safe food handling.

Who Should Get an ALEX3 Allergy Test?

ALEX3 is ideal for anyone experiencing allergic symptoms, particularly if:

Symptoms Suggesting Allergies

• Respiratory: Hay fever, allergic rhinitis, sneezing, runny nose, nasal congestion, asthma, wheezing
• Skin: Eczema, hives (urticaria), itching, angioedema (swelling)
• Gastrointestinal: Nausea, vomiting, abdominal pain, or diarrhoea after eating certain foods
• Oral Allergy Syndrome: Itching or tingling in mouth/throat after eating certain fruits or vegetables
• Anaphylaxis: History of severe allergic reactions

Situations Where ALEX3 is Particularly Valuable

• Multiple or unclear allergic reactions
• Standard allergy tests haven't provided clear answers
• You need to understand cross-reactivity patterns
• Assessing risk before immunotherapy
• Unexplained food reactions despite negative standard tests
• Planning dietary modifications or reintroductions
• Travel planning (identifying allergens in different cuisines)

What Happens After Your ALEX3 Results

Your ALEX3 test at Lambert Medical Practice includes a comprehensive follow-up process:

1. Results Analysis: Our team reviews your comprehensive ALEX3 report
2. GP Consultation: A dedicated appointment (included in the price) to discuss your results in detail
3. Personalised Report: You'll receive a detailed breakdown of all your sensitisations
4. Management Plan: Practical advice on allergen avoidance, dietary modifications, and emergency planning if needed
5. Referral if Needed: For complex cases or immunotherapy consideration, we can arrange specialist referrals

ALEX3 Allergy Testing Price

We offer ALEX3 testing at a competitive, all-inclusive price: