Immunoglobulin E
Private Immunoglobulin E blood test in London for £48, measuring total IgE with results expected in around 1 business day.
Turnaround time
1 business day
Biomarkers count
1
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Overview of the Immunoglobulin E Test
The Immunoglobulin E blood test measures the total concentration of IgE antibodies circulating in the blood.
The test contains 1 biomarker: Immunoglobulin E.
IgE is an antibody class involved prominently in immediate allergic and hypersensitivity reactions.
When an IgE-sensitised person encounters a relevant allergen, allergen-specific IgE can trigger mast cells and basophils to release histamine and other inflammatory mediators.
IgE-mediated mechanisms are involved in many cases of hay fever, allergic asthma, food allergy and atopic eczema.
However, a total IgE measurement is not the same as allergen-specific IgE testing.
Total IgE measures the overall concentration of IgE antibodies but does not identify which allergen, if any, is responsible for symptoms.
A person can have high total IgE without one obvious allergy.
Conversely, a person can have a clinically important specific allergy even when total IgE is not particularly elevated.
Total IgE can also rise in some parasitic infections and selected uncommon immunological conditions.
The result is therefore a broad immune marker rather than a definitive allergy diagnosis.
When symptoms point to a particular trigger, Individual Allergen or specific-IgE testing is generally more informative.
What Does the Immunoglobulin E Test Check?
The test measures total circulating IgE and provides broad information about IgE-related immune activity rather than identifying one particular allergen. This test measures 1 biomarker.
Immunoglobulin E
Measures total serum IgE, an antibody class involved in allergic and hypersensitivity responses and selected other immune processes.
Who May Benefit From the Immunoglobulin E Test?
Total IgE may be useful when allergic or atopic disease is being investigated as part of a broader clinical assessment.
People with suspected allergic disease - Total IgE can provide broad allergy-related immune context.
People with persistent hay-fever symptoms - IgE-mediated mechanisms commonly contribute to allergic rhinitis.
People with allergic asthma or suspected atopic asthma - Total IgE may form part of specialist assessment.
People with eczema and other atopic features - IgE can be elevated in atopic dermatitis.
People with unexplained recurrent hives or itching - Total IgE may be one component of a wider investigation.
People preparing for more targeted allergy testing - The result can complement allergen-specific IgE measurements.
People with suspected parasitic infection in an appropriate clinical context - Some parasitic infections can substantially increase IgE.
People with a previous markedly raised total IgE result - Repeat testing can assess whether the concentration remains elevated.
How to Prepare
Do not deliberately expose yourself to a suspected allergen before testing.
If the aim is to identify a specific trigger, a targeted allergen-specific IgE test is usually more informative than total IgE alone.
Symptoms and Reasons to Consider the Immunoglobulin E Test
Symptoms associated with IgE-mediated allergy can affect the nose, eyes, skin, lungs and gastrointestinal tract, but total IgE cannot identify the exact trigger.
Persistent sneezing or nasal congestion - Allergic rhinitis can involve IgE-mediated inflammation.
Itchy or watery eyes - Environmental allergy can produce allergic conjunctival symptoms.
Recurrent hives - IgE-mediated reactions are one of several possible causes of urticaria.
Persistent itching or eczema - Atopic disease can be associated with elevated total IgE.
Wheezing or allergic asthma symptoms - IgE-mediated sensitisation may contribute.
Food-related reactions - Total IgE can provide background information, but specific allergens need targeted testing.
Multiple suspected allergic triggers - A raised total IgE may support a broader atopic tendency but cannot identify which trigger is relevant.
A normal total IgE result does not rule out a clinically important specific allergy.
Throat swelling, difficulty breathing, collapse or rapidly progressive allergic symptoms require emergency treatment rather than routine total IgE testing.
How to Book Your Immunoglobulin E Test
The Immunoglobulin E test can be booked privately as an individual total-IgE measurement.
Choose the Immunoglobulin E
Select the individual total IgE blood test online.
Select your sample collection option
Choose an in-clinic blood draw or professional home or hotel phlebotomy.
Attend your appointment
A trained healthcare professional collects the required venous blood sample.
Laboratory analysis
Your serum is analysed to measure total Immunoglobulin E.
Receive your results securely
Your authorised IgE result is delivered securely and can be interpreted alongside symptoms and allergen-specific testing where appropriate.
When Will I Receive My Results?
The current expected turnaround for Immunoglobulin E is approximately 1 business day after laboratory receipt.
Total IgE is a routinely available immunology measurement.
The laboratory completes analysis, quality-control checks and result authorisation before reporting.
Turnaround starts from laboratory receipt rather than necessarily from the exact time of collection.
More specialised allergen-specific or component-resolved tests may have different turnaround times when ordered separately.
Understanding Your Results
A low or normal total IgE concentration does not completely exclude IgE-mediated allergy.
Someone may have clinically important specific IgE against one allergen while their total IgE remains within the reference interval.
A raised total IgE indicates increased overall IgE production.
This is commonly associated with atopic conditions such as allergic rhinitis, asthma or eczema, but the result is not specific to allergy.
Parasitic infections and selected immune disorders can also increase IgE.
The total value cannot tell you whether you are allergic to grass, milk, peanuts, pets or another individual trigger.
Where a specific allergen is suspected, targeted specific-IgE testing provides more clinically useful information.
Why Book With London Blood Tests?
London Blood Tests provides rapid private total-IgE measurement that can support a broader allergy or immunology assessment.
Measures total IgE directly - Provides information about overall IgE-mediated immune activity.
Useful in allergy assessment - Can contribute to evaluation of atopy, asthma, eczema and allergic rhinitis.
Complements specific-IgE testing - Helps provide broader context when individual allergens are being investigated.
No allergen challenge required - A venous blood sample is sufficient.
Antihistamines generally do not interfere - Serum IgE can usually be tested without stopping antihistamine treatment.
Fast laboratory results - Current turnaround is approximately 1 business day.
Private collection options - Clinic and professional home or hotel phlebotomy are available.
Clear pricing - The Immunoglobulin E test costs £48.
Private Immunoglobulin E Blood Test in London
London Blood Tests provides private total Immunoglobulin E testing in London for people requiring assessment of overall IgE-related immune activity.
The test costs £48 and measures 1 biomarker: Immunoglobulin E.
Results are expected approximately 1 business day after laboratory receipt.
Total IgE cannot identify the allergen responsible for symptoms, so specific-IgE testing may be required where a particular trigger is suspected.