Egg White IgE Level
Private Egg White IgE Level blood test in London for £55, measuring one food allergy marker with results in around 2 business days.
Turnaround time
2 business days
Biomarkers count
1
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Overview of the Egg White IgE Level
The Egg White IgE Level blood test measures allergen-specific immunoglobulin E antibodies directed against proteins present in egg white.
IgE antibodies are involved in immediate allergic reactions.
When someone has become sensitised to egg proteins, exposure can activate IgE-bound mast cells and basophils, releasing histamine and other inflammatory mediators.
The test contains 1 biomarker: Egg White IgE Level.
Egg allergy is particularly common in children, although it can also persist into adolescence or adulthood.
Possible reactions include hives, itching, swelling, vomiting, wheezing or, less commonly, anaphylaxis.
A positive Egg White IgE result demonstrates sensitisation, not automatically clinical allergy.
Some people have detectable specific IgE but can eat egg without developing symptoms.
The numerical IgE concentration can contribute to assessment of the probability of clinical reactivity, but it does not reliably predict how severe a future reaction may be.
Whole egg-white IgE also does not by itself determine whether someone can safely tolerate extensively heated or baked egg.
Where more detailed assessment is needed, component testing such as ovomucoid and ovalbumin may provide additional information, although specialist interpretation remains important.
The result should always be considered alongside the timing, reproducibility and severity of previous reactions.
What Does the Egg White IgE Level Test Check?
This test measures 1 biomarker.
Egg White IgE Level
Measures IgE antibodies directed against proteins found in egg white. Detectable or elevated concentrations indicate sensitisation but do not independently confirm clinical egg allergy or predict reaction severity.
Who May Benefit From the Egg White IgE Level Test?
This test may be suitable where symptoms occurring after egg exposure raise concern about an IgE-mediated food allergy.
People who develop symptoms after eating egg - Specific IgE testing can provide supporting evidence of allergic sensitisation.
Children with suspected egg allergy - Egg is a common childhood food allergen and targeted blood testing may form part of assessment.
People with hives after egg exposure - Immediate urticaria can occur during IgE-mediated food reactions.
People with lip or facial swelling after eating egg - Angioedema may warrant targeted allergy investigation.
People with vomiting shortly after egg exposure - Gastrointestinal symptoms can occur as part of an immediate allergic reaction.
People with wheezing or breathing symptoms after egg - Respiratory involvement can indicate a more significant reaction.
People who cannot undergo skin-prick testing - Serum-specific IgE can provide an alternative method of assessing sensitisation.
People with a previous positive Egg White IgE result - Repeat measurement may sometimes contribute to specialist follow-up.
Specialist-requested egg allergy testing - Testing can be arranged where an allergist, paediatrician or GP has requested egg white-specific IgE.
How to Prepare
Do not attempt an unsupervised food challenge simply to determine whether you remain allergic.
The result is most useful when interpreted alongside a detailed clinical history.
Symptoms and Reasons to Consider the Egg White IgE Level Test
IgE-mediated egg allergy generally produces symptoms relatively soon after exposure.
Hives or an itchy rash - Urticaria can develop shortly after egg ingestion.
Swelling of the lips or face - Facial angioedema can occur during an immediate allergic reaction.
Itching or tingling in the mouth - Oral symptoms may appear soon after exposure.
Vomiting or abdominal discomfort - Gastrointestinal symptoms can form part of an IgE-mediated reaction.
Wheezing - Respiratory symptoms require careful assessment because they can indicate a more significant reaction.
Coughing or breathing difficulty after egg - Respiratory involvement can occur during food allergy.
Dizziness or feeling faint - These can occur during a severe systemic allergic reaction.
Repeated symptoms after foods containing egg - A reproducible relationship between exposure and symptoms increases the clinical relevance of testing.
Symptoms alone do not establish an egg allergy, and a positive blood result indicates sensitisation rather than automatically proving clinical reactivity.
The test cannot reliably predict how severe a future reaction would be.
Breathing difficulty, tongue or throat swelling, collapse or rapidly worsening symptoms after food exposure are medical emergencies and require immediate treatment.
How to Book Your Egg White IgE Level Test
Booking your Egg White IgE Level test with London Blood Tests is straightforward.
Choose the Egg White IgE Level
Select the test online and review the included egg white-specific allergy marker.
Select your sample collection option
Choose an in-clinic blood draw (+£35) or a home or hotel phlebotomy visit (+£60).
Attend your appointment
A trained professional collects the required venous blood sample.
Laboratory analysis
Your serum is analysed for specific IgE antibodies directed against egg white proteins.
Receive your results securely
Your authorised result is delivered securely by email.
When Will I Receive My Results?
The expected turnaround time for the Egg White IgE Level test is approximately 2 business days after laboratory receipt.
Specialist allergy analysis or repeat testing may occasionally extend reporting.
Understanding Your Results
A low or undetectable result means little or no measurable egg white-specific IgE was detected.
This makes IgE-mediated egg allergy less likely but does not completely override a strongly suggestive clinical history.
A detectable or elevated result demonstrates sensitisation.
Sensitisation means the immune system recognises egg-white proteins through IgE antibodies, but the person may or may not develop symptoms when egg is eaten.
Higher specific-IgE concentrations can sometimes be associated with an increased probability of clinical reactivity.
They do not reliably predict reaction severity.
Where the blood result and clinical history do not agree, specialist allergy assessment may include skin-prick testing, component testing or a medically supervised oral food challenge.
Why Book With London Blood Tests?
Private egg allergy testing in London - Access targeted Egg White IgE measurement privately.
Single-allergen assessment - Test egg white sensitisation without having to purchase a broad food-allergy panel.
No deliberate food exposure required - Blood testing can be performed without eating egg beforehand.
Antihistamines usually do not need to be stopped - Serum-specific IgE can generally be measured while antihistamines are being used.
Specialist allergy laboratory analysis - Samples are processed using allergen-specific IgE methods.
Fast laboratory turnaround - Results are expected in approximately 2 business days.
Clinic and home visit options - Choose clinic or professional mobile phlebotomy.
Clear pricing before booking - The test costs £55.
Private Egg White IgE Level Blood Test in London
London Blood Tests provides the Egg White IgE Level blood test in London for adults and children requiring targeted investigation of suspected egg sensitisation.
The test costs £55 and measures one biomarker: Egg White IgE Level.
A positive result should be interpreted alongside clinical reaction history rather than treated as proof that egg must always cause symptoms.
Further specialist testing may be useful where the result is unclear or where tolerance of baked egg is being assessed.