Blood Testing for Allergies

Get clear answers about your allergies for you and your family at London's leading clinic. We provide expert testing and a tailored care plan, backed by world-renowned expertise.
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Understanding allergy blood tests

Blood testing is a key part of our evidence-based diagnostic approach. These tests offer detailed insights into your immune system's response to specific allergens, guiding us in creating precise, personalised treatment plans.

How blood tests support your diagnosis

Blood tests work alongside other diagnostic methods to provide a complete picture of your allergies. They are particularly valuable for:
Creating personalised treatment plans based on your specific immune responses
Evaluating the safety of introducing new foods when combined with skin prick testsing
Assessing suitability for immunotherapy treatments
Investigating complex cases that require deeper analysis

The testing process

Our experienced nurses and specialists conduct blood tests at our partner facilities:
The Doctors' Laboratory, Wimpole Street
(for appointments at 215 Great Portland Street)
London Medical,
Ground Floor
(for appointments at 49 Marylebone High Street)
Note: These specialist tests must be requested during your initial consultation with your LACK allergist

Making your visit comfortable

We understand that blood tests can cause anxiety, especially for children. Our team specialises in making the experience as reassuring as possible.
Before your visit
  • Continue your regular medications, including antihistamines
  • Maintain normal eating patterns unless advised otherwise
  • Wear comfortable clothing with loose sleeves
What to bring
  • Your current medication list 
  • Notes about your symptoms and triggers
  • Insurance details if applicable
For children
  • We provide numbing cream to ensure comfort
  • Bring favourite toys or activities for distraction Our nurses are specially trained in children's care
  • Parents are encouraged to stay throughout

What to expect

The blood sample is taken from your inner arm by our experienced team. The process is quick, typically taking just a few minutes:
Results are usually available within 3-5 working days
Some detailed analyses may take longer
Your consultant will discuss expected timeframes during your visit

After your test

Once your results are ready, your consultant will:
Review your complete test results
Develop a personalised treatment plan
Explain the findings in clear, understandable terms
Answer any questions you may have about the results or next steps

Your partner in allergy care

Our approach combines cutting-edge research with personalised care. Led by Professor Gideon Lack, whose groundbreaking LEAP study transformed our understanding of allergy prevention, our team provides evidence-based care focused on delivering the best possible outcomes for our patients.
More About the LACK Clinic
Eczema
“As far as our family is concerned, Professor Lack is a miracle worker. We trust his advice implicitly and are very lucky to have him as our daughter’s specialist.”
Eczema
28th Sept 2024
Eczema
verified patient

Common questions about allergy testing

What can blood tests tell us about allergies?
Blood tests measure specific antibodies (IgE) that your immune system produces in response to allergens. This helps us understand:
  • Which substances trigger your allergic reaction
  • The intensity of your allergic responses
  • Changes in your allergy levels over time
  • Potential cross-reactions between different allergen
How accurate are blood tests for diagnosing allergies?
Blood tests provide highly reliable results when interpreted alongside your clinical history by our specialist team. We use the most advanced testing methods available and always consider your results as part of a complete diagnostic assessment.
What happens during the blood test?
The test is straightforward and typically takes just a few minutes. One of our experienced nurses will:
  • Clean a small area of your inner arm
  • Take a blood sample using a fine needle
  • Apply a small plaster to the site
  • The sample is then sent to our specialist laboratory for analysis
What makes blood tests different from skin prick tests?
Blood tests offer several distinct advantages:
  • Can be performed while continuing asthma and antihistamine medications
  • Suitable for people with extensive eczema
  • Can test for multiple allergens with one blood sample
  • Provide numerical results that can be tracked over time
Are blood tests suitable for children?
Yes, blood tests are very suitable for children. Our nursing team is specially trained in paediatric care and uses techniques to make the experience as comfortable as possible. We can provide numbing cream and use child-friendly distraction techniques during the procedure.
When will I receive my results?
Most results are available within 3-5 working days. Your consultant will explain your expected timeframe during your consultation and discuss your results in detail at your follow-up appointment.

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Ready to take control of your allergies?

Our expert team is here to guide you through understanding your allergies better, helping you make informed decisions about your health.
Speak to the Team
London Medical 

49 Marylebone High St.
The Portland Hospital 

215 Great Portland Street 

07493 280048 
/ 07765 977819
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