Peanut IgE level
Private Peanut IgE testing in London for £68, measuring one peanut-specific allergy marker with results expected in around 2 days.
Turnaround time
2 business days
Biomarkers count
1
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Overview of the Peanut IgE level Test
The Peanut IgE level blood test measures IgE antibodies directed against peanut proteins, supporting assessment of possible IgE-mediated peanut allergy.
The test assesses 1 allergy biomarker: Peanut IgE level.
Peanut allergy is an immune-mediated food allergy in which the body produces specific IgE antibodies against proteins contained within peanuts.
When somebody with clinically significant peanut allergy is exposed to peanut, these antibodies can trigger rapid release of inflammatory mediators.
Symptoms may affect the skin, gastrointestinal tract, respiratory system or cardiovascular system.
Reactions can range from localised itching or hives to severe systemic anaphylaxis.
A Peanut IgE blood test identifies allergic sensitisation.
Sensitisation and clinical allergy are not exactly the same.
Some people have detectable peanut-specific IgE but can eat peanut without developing symptoms.
The concentration therefore needs to be interpreted alongside the person's actual reaction history.
A higher Peanut IgE concentration can increase the likelihood that sensitisation is clinically relevant, but the numerical level does not reliably predict how severe a future reaction will be.
Where the result or clinical history remains uncertain, Peanut Components testing can provide more detailed information.
Component-resolved testing assesses antibodies to individual peanut proteins such as Ara h 1, Ara h 2, Ara h 3, Ara h 6, Ara h 8 and Ara h 9.
Ara h 2 and related storage proteins can be particularly relevant when assessing true systemic peanut allergy, while some other components can reflect cross-reactivity with pollen.
This test investigates immediate IgE-mediated allergy and is different from food-intolerance testing.
What Does the Peanut IgE level Test Check?
The test measures IgE antibodies directed against peanut proteins. This test measures 1 biomarker.
Peanut IgE level
Measures peanut-specific IgE antibodies, supporting assessment of IgE-mediated peanut sensitisation when interpreted alongside symptoms and exposure history.
Who May Benefit From the Peanut IgE level Test?
Peanut IgE testing can be useful where symptoms occur soon after peanut exposure or where previous allergy testing requires clarification.
People who develop hives after eating peanuts - Immediate skin reactions can occur with IgE-mediated food allergy.
People with lip, tongue or facial swelling after peanut exposure - Angioedema can occur during an allergic reaction.
People who experience wheezing or breathing difficulty after eating peanuts - Respiratory symptoms can indicate a potentially serious reaction.
People with rapid vomiting or abdominal symptoms after peanut exposure - Gastrointestinal symptoms can occur as part of food allergy.
Children with suspected peanut allergy - Specific IgE testing can form part of paediatric allergy assessment.
People with other nut or food allergies - Peanut testing can clarify whether sensitisation extends to peanut.
People with an uncertain previous skin-prick test - Blood testing provides another method of assessing sensitisation.
People with previous Peanut IgE results requiring follow-up - Repeat testing can occasionally help an allergy specialist assess changes over time.
How to Prepare
You do not need to expose yourself to peanut immediately before the blood test.
A blood specific-IgE measurement can be performed without deliberate allergen exposure.
Symptoms and Reasons to Consider the Peanut IgE level Test
IgE-mediated peanut reactions generally occur within minutes to a few hours after exposure.
Hives or widespread itching - Urticaria is a common immediate allergic manifestation.
Lip, tongue or facial swelling - Angioedema can occur following exposure.
Throat tightness - This can indicate a potentially serious systemic reaction.
Wheezing or breathing difficulty - Respiratory involvement can occur during anaphylaxis.
Vomiting or abdominal pain shortly after eating peanuts - Food allergy can cause rapid gastrointestinal symptoms.
Dizziness, collapse or faintness after peanut exposure - Cardiovascular involvement can occur during severe anaphylaxis.
Consistent symptoms following peanut-containing foods - A reproducible exposure pattern increases the clinical relevance of testing.
Difficulty breathing, throat swelling, collapse or rapidly progressive symptoms after peanut exposure can represent anaphylaxis and require emergency treatment.
A Peanut IgE concentration cannot predict the severity of a future allergic reaction.
How to Book Your Peanut IgE level Test
The Peanut IgE level test can be booked privately for focused assessment of peanut-specific allergic sensitisation.
Choose the Peanut IgE level
Select the individual Peanut IgE blood test online.
Select your sample collection option
Choose an in-clinic blood draw or professional home or hotel phlebotomy where suitable.
Attend your appointment
A trained healthcare professional collects the required venous blood sample.
Laboratory analysis
Your serum undergoes measurement of Peanut IgE level.
Receive your results securely
Your authorised result is delivered securely and can be interpreted alongside reaction history and other allergy investigations.
When Will I Receive My Results?
The specialist laboratory turnaround for Peanut IgE level is approximately 2 days after laboratory receipt.
The sample undergoes allergen-specific IgE analysis, laboratory quality-control procedures and result authorisation.
Turnaround begins when the specimen reaches the laboratory rather than necessarily from the time of collection.
Understanding Your Results
A negative or very low result means significant peanut-specific IgE was not detected by the assay.
This makes IgE-mediated peanut sensitisation less likely but cannot completely exclude allergy where the clinical reaction history is strongly suggestive.
A positive result demonstrates sensitisation to peanut proteins.
It does not automatically prove that eating peanut will cause symptoms.
The concentration should be interpreted with age, reaction history and any other allergy results.
Higher concentrations can increase the probability of true clinical allergy but cannot reliably predict reaction severity.
Component-resolved testing can provide additional information where the result is difficult to interpret.
A medically supervised oral food challenge remains the reference method for establishing whether a food is clinically tolerated when specialist assessment considers this safe and necessary.
Why Book With London Blood Tests?
London Blood Tests provides private Peanut IgE testing for focused food-allergy assessment.
Measures peanut-specific IgE - The test directly assesses allergic sensitisation to peanut proteins.
Useful for immediate food reactions - Testing can support investigation where symptoms occur rapidly after exposure.
No deliberate peanut exposure is required - The blood test can be performed without eating the suspected allergen.
Antihistamines generally do not interfere - Specific IgE testing can normally be performed while taking antihistamines.
Can be followed by Peanut Components - Component testing can provide more detailed information about sensitisation patterns.
Suitable for adults and children where appropriate - Specific IgE testing is widely used across different age groups.
Professional blood collection - Clinic and suitable home or hotel phlebotomy appointments are available.
Clear pricing - The Peanut IgE level test costs £68.
Private Peanut IgE level Blood Test in London
London Blood Tests provides private Peanut IgE testing for people requiring investigation of suspected IgE-mediated peanut allergy.
The test costs £68 and measures 1 allergy biomarker.
Results are expected approximately 2 days after laboratory receipt.
A positive result demonstrates sensitisation and should be interpreted alongside the person's actual reaction history.