ALEX³ Multiplex Allergy Profile (300 Allergens + Total IgE)
300 allergen triggers + Total IgE · 218 molecular components · one small finger-prick tube
The multiplex allergy ALEX³ profile has upgraded from ALEX2 to ALEX3. Analysed by The Doctors Laboratory, ALEX³ includes a comprehensive panel of 300 allergens covering high-relevance allergen sources — including animal dander, cereals, egg, legumes, milk, mites, moulds, pollen, seafood, tree nuts, and venoms — supplemented with a Total IgE. Crucially, it contains 218 molecular allergens (107 of which are completely unique to the ALEX³ test), providing a comprehensive sensitisation profile. In practical terms, this molecular technology pinpoints the exact protein components triggering your immune system, helping distinguish between true primary allergies and harmless cross-reactions from a single home finger-prick sample.
UNIQUE BIOMARKERS MEASURED
301
View included biomarkers & what each group covers
Measures overall baseline IgE antibody levels.
- Total IgE
- Hazelnut
- Walnut
- Cashew
- Pistachio
- Almond
- Brazil Nut
- Pecan
- Peanut (including key molecular components)
- Soya
- Chickpea
- Lentil
- Pea
- Lupin
- Cow’s Milk extract
- Casein
- Alpha-lactalbumin
- Beta-lactoglobulin
- Egg White
- Egg Yolk
- Ovomucoid (heat-resistant marker)
- Wheat
- Gluten / Gliadin components
- Rye
- Barley
- Oats
- Buckwheat
- Quinoa
- Cod
- Salmon
- Tuna
- Prawn / Shrimp
- Crab
- Lobster
- Mussels
- Cat
- Dog
- Horse
- Small furry animals
- Grasses (Timothy, Rye)
- Trees (Birch, Alder, Hazel, Oak, Olive)
- Weeds (Mugwort, Ragweed)
- House dust mites (D. pteronyssinus, D. farinae)
- Storage mites
- Alternaria
- Aspergillus
- Cladosporium
- Penicillium
- Bee venom proteins
- Wasp venom proteins
An allergy blood test measures IgE sensitisation to a trigger; it cannot by itself confirm that a trigger is causing your symptoms. Results should be interpreted with an appropriate healthcare professional.
Adults wanting a complete 300-trigger screen from a single blood sample rather than several separate tests.
- Unexplained skin rashes, hives or eczema that flare without a clear cause
- Hay fever, rhinitis or persistent sneezing and itchy, watery eyes
- Digestive bloating, discomfort or cramping after meals
- Wanting a complete 300-trigger screen from a single finger-prick sample
If you are feeling acutely unwell, have severe or rapidly worsening symptoms, or are already under the care of a healthcare professional for a related condition, please speak to them before ordering or alongside testing.
Home finger-prick blood sample, collected by you at home using the supplied kit. Full step-by-step instructions are included.
Follow the instructions provided with your kit. One small finger-prick tube is required — no separate sample for each allergen.
ALEX³ Upgrade Launch Offer: Save £30 today (£319.00)
Just £1.06 per allergen tested! Only 1 small finger-prick tube required.
Now £319 — automatically applied, no discount code required.
Standard price £349.00 — the launch price is applied automatically at checkout
Collection Confidence Guarantee
- Simple at-home finger-prick collection kit included
- Prepaid Royal Mail Tracked 24 return mailer included
- Analysed by The Doctors Laboratory (UKAS Accredited)
- Free Replacement Kit Guarantee: if your sample clots or is insufficient for laboratory analysis, we dispatch a replacement kit free of charge.
- No hidden test or delivery charges
Drop in any postbox using the prepaid Royal Mail Tracked 24 mailer.
5–7 working days
Turnaround begins as soon as The Doctors Laboratory receives your sample via Tracked 24 post. Covered by our Free Sample Replacement Guarantee if your sample is insufficient.
How You'll Receive Your Results
Once your laboratory analysis is complete, your original laboratory report will be delivered securely to your verified email address.
- Original laboratory PDF report
- Sent to your verified email address
- Secure results delivered via email
- Reports are not stored in your OptiBlood website account
- Please check that your email address is correct before completing your order
An allergy blood test measures IgE sensitisation to a trigger; it cannot by itself confirm that a trigger is causing your symptoms. Results should be interpreted with an appropriate healthcare professional.
A result within the reference range does not rule out a condition, and a result outside the range does not by itself confirm one. Results should be considered alongside your symptoms and medical history.
A laboratory result is information, not a diagnosis. Discuss concerning results, or results that differ from what you expected, with an appropriate healthcare professional. They can interpret your results alongside your symptoms and medical history.
OptiBlood tests provide laboratory information and are not a substitute for medical diagnosis, physical examination or emergency care. Discuss concerning results or symptoms with an appropriate healthcare professional.