Suite 4, 117A Harley Street London, W1G 6AT

Allergy Testing
Allergy Testing

Private Allergy Testing in London

We provide allergy testing services in London for both adults and children. Our expert medical team offer both blood testing and skin prick testing or SPT for allergy diagnosis, including food, inhalants and environmental allergens.

The skin prick test requires bringing allergen samples to the appointment for our Consultant Immunologist to perform a small skin prick for the allergen. This detects any reaction to the allergen and is most suitable when screening for a specific allergen.

Allergy blood testing panels are conducted via a simple blood draw, with results returning to you directly from the laboratory. These panels offer a vast array of screening for the most common allergens, so it's best suited for those suspecting an allergy, but uncertain if this is the case.

ALEX² Allergy Test ALEX®


About Allergy

About Allergy

Allergies are hypersensitive reactions from the immune system responding to substances that enter or contact the body. The allergens may include irritants like pet dander, bee venom or pollen.

Any substance can be an allergen, provided it triggers an adverse reaction from the immune symptoms to produce reactions.

Any substance that causes any allergic reaction is known as an allergen. These allergens may be in the environment, foods or drinks.

Different types of allergies

Different types of allergies

Allergies range from mild irritation to extremely severe reactions, which may be life-threatening. Common allergic conditions include:

  • Perennial, rhinitis and seasonal, also called hay fever
  • Anaphylaxis or anaphylactic shock produces a severe reaction
  • Asthma, causing breathing difficulty
  • Angioedema and uriticaria- hives
  • Lung inflammation or extrinsic allergy alveolitis resulting from inhaling organic dust
  • Oral allergy syndrome called pollen food allergy
  • Eczema, ranging from a mild to extremely severe case
  • Allergy to drugs, certain foods like eggs and peanuts, drugs and penicillin
  • Celiac disease that may cause an intestinal reaction to gluten present in wheat

Common symptoms of allergy

  • Asthma
  • Rhinitis
  • Sinus pain
  • Migraines
  • Swelling
  • Eczema
  • Diarrhoea, vomiting or sickness
  • Rashes or hives
  • Runny nose
  • Wheezing
  • Hyperactivity
  • Itchy eyes, mouth, ears, lips or throat
Hepatitis A testing

Allergy diagnosis

Initial allergy diagnosis involves a clinical exam by a specialist doctor and then the following investigations.

  • Challenges test with drugs or foods
  • Skin prick testing
  • Allergy blood testing
  • Respiratory function test
  • Other investigations, such as bronchoscopy and endoscopy

We do not recommend conducting allergy tests without consultation with our specialist doctor.

Allergy diagnosis

Other Packages

Allergic Rhinitis/Asthma Profile


Allergy Profile 1
(Food & Inhalants)


Allergy Profile 2
(UK Aero Allergen)


Allergy Profile 3


Allergy Profile 4
(Nuts & Seeds)


Allergy Profile 5
(Children’s Panel)


Allergy Profile 6


Allergy Profile 7


Allergy Profile 8
(Cereal – singles)


Allergy Profile 9


Allergy Profile 10


Allergy Profile 11
(Combined Shellfish/Finfish)


Allergy Profile 12
(Milk & Milk Proteins)


Allergy Profile 13
(Stone fruit/Rosaceae family)


Atopic Dermatitis/Eczema Profile
(14 allergens)


Gluten Sensitivity Profile



Our Clinic offers allergy testing in London for:

Skin prick test

This test is quick, safe, causes minimal pain and gives an accurate result after 20 minutes. The specialist will apply little drops of the allergen extract to the skin and puncture it lightly using a shallow lancet. You can undergo a skin prick test at our clinic.

If you have IgE antibodies, a welt or wheal of 5 – 15mm wide will appear. If the welts disappear within 30 minutes to one hour, you may experience a strong allergic reaction to the allergen. However, the specialist will closely monitor the reaction and provide the right treatment when the reaction occurs.

Blood Testing Panels

The test is conducted from a blood sample collected at the clinic and referred to a laboratory for analysis.

They detect the presence of allergen-specific immunoglobulin E (IgE) antibodies that float around in the bloodstream. It is this IgE antibody that produces the symptoms of an allergy. These antibodies are produced in contact with normal proteins contained in food and can be detected via this simple laboratory test.

Allergy testing cost

We provide different tests, including the negative control, positive control and eight chosen allergens for the primary skin prick test.

The skin prick testing cost is £400 including the consultation, but you can add about five more antigens, with each costing £10.

Blood testing panels vary in price, depending on the profile selected, please see our fees page for more information.

Allergy Treatment and testing

Several treatment options are available for people with an allergy. The treatments include modern immunomodulating or biological medicines. However, allergies are unique to patients, and you need to discuss the most suitable treatment with the immunologist.

ISAC test – screening for 112 allergens with one blood sample
Call to Action

Visit GP London Clinic to see an immunologist for your allergy testing. You can also contact us at 020 70434317 to book an appointment for your allergy testing in Harley Street, London.

FAQs on allergy testing

The antibody test for antigen-specific IgE checks for any allergy to certain substances. The test usually done when performing a skin prick test isn’t an option. If significant eczema or dermatitis is present or the patient takes antihistamines, it can interfere with interpreting or performing the skin prick test.

The antigen-specific IgE test has limited use in assessing patients that have outgrown an allergy. This test will still give a positive result for patients that have outgrown an allergy. It will likely stay positive for patients who have had successful immunotherapy procedures.

This antibody testing is suitable for those who experience symptoms suggesting they are allergic to one or several substances.

A negative allergy result means you may not have a true allergen, an immunoglobulin E-mediated response to a particular allergen. However, using and interpreting an antibody test of allergen-specific IgE requires caution.

No perfect test is available, but a negative test indicates you aren’t addicted to the substance, and it doesn’t cause an allergy.

An elevated result likely indicated an allergy. But, not all patients who undergo the test have the same physical allergic reaction when exposed to the substance. The patient is classified as sensitised, not allergic to the substance in certain cases.

The amount of a specific IgE doesn’t indicate the severity of the reaction. However, the higher the amount of IgE, the more likely a patient will have any form of reaction to allergens. Confirming an allergy diagnosis will require your allergy test and your medical history.

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