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Private Blood Tests London at The Scan Clinic

Alex Allergy Test London – 300 Allergens

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Blood Testing
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Blood Results



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The Scan Clinic London East,

635A Cranbrook Road,

Gants Hill IG2 6SX

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Call us on:

0203 904 7706

Monday – Saturday 9am – 5pm


Biomarkers Included with the Alex Allergy Test London – 300 Allergens blood test

Scroll down for more information about each biomarker

About the Alex Allergy Test London – 300 Allergens blood test

The Alex Allergy Test is a state-of-the-art combined allergy blood test with proven detection for up to 300 different allergens.

The test is very detailed and will provide lots of information on over up to 300 specific allergens and concentrations of IgE (immune antibodies) per allergen group.

It is extremely useful if you suspect you may be allergic to something and want to pin point what it is in and for finding the correct treatment for the specific allergen.

Allergen groups included in this test are:

  • Pollen (Grass, Tree, Weed)
  • Mites (House, Dust & Storage mites)
  • Microorganisms (Fungal Spores & Yeast)
  • Plant-Based Foods (Legumes, Grains, Spices, Fruits, Vegetables, Nuts & Seeds)
  • Animal Derived Foods (Milk, Egg, Fish, Seafood, Meat)
  • Insects and Venoms (Ant, Bee, Wasp, Cockroach)
  • Epithelial tissues of pets and animals (Pets, Farm Animals)
  • Latex
  • Ficus
  • CCD
  • Parasites
  • And many more cross-reactive allergen families

The turnaround time for results is 5-10 days.

What is an Allergy?

An allergy is an abnormal immune system response to substances that are usually harmless to most people. These substances, known as allergens, can trigger an allergic reaction in individuals who are sensitive or allergic to them. Common allergens include certain foods, pollen, animal dander, insect stings, mould spores, and certain medications.

When a person with allergies comes into contact with an allergen, their immune system may overreact and produce antibodies called immunoglobulin E (IgE). These antibodies trigger the release of chemicals, such as histamine, into the bloodstream. Histamine and other chemicals are responsible for the symptoms of an allergic reaction, which can vary widely depending on the type of allergen and the individual’s sensitivity.

Common symptoms of allergies include:

  1. Respiratory symptoms: Sneezing, runny or stuffy nose, coughing, wheezing, shortness of breath.
  2. Skin symptoms: Itching, hives, eczema, redness, swelling.
  3. Gastrointestinal symptoms: Nausea, vomiting, diarrhoea, abdominal pain.
  4. Eye symptoms: Red, itchy, watery eyes.
  5. General symptoms: Fatigue, headache, irritability.

In severe cases, an allergic reaction can lead to anaphylaxis, a life-threatening reaction that requires immediate medical attention. Anaphylaxis can cause difficulty breathing, a drop in blood pressure, and loss of consciousness.

Allergies can be diagnosed through various methods, including medical history, physical examination, and allergy testing. Treatment may involve avoiding allergens, taking medications to relieve symptoms (antihistamines, decongestants, etc.), and, in some cases, undergoing allergen immunotherapy (allergy shots).

What is an ALEX® Allergy test?

The ALEX Allergy test examines up to 300 types of allergens simultaneously. The array of allergens encompasses common triggers for allergies, such as foods, pollen, cat and dog dander, mites, insect venoms, moulds and yeasts, and latex.

You can find a comprehensive list of tested allergens in the ALEX-Allergen-List.pdf.

Individuals with allergies typically exhibit elevated levels of IgE in their blood. The ALEX Allergy test assesses:

  1. The total concentration of IgE antibodies in the blood provides insights into the likelihood of an allergy (unlikely, possible, or likely).
  2. The quantity of IgE antibodies produced in response to each specific allergen, indicating test results as negative/uncertain or showing low, moderate, high, and very high levels of IgE.
  3. Cross-reactivity between different allergens due to the presence of a protein (a PR-10 allergen) with a similar structure—for instance, the connection between birch tree pollen and various foods.

Why is an ALEX® Allergy test important?

Over-the-counter home allergy tests may lack reliability, heightening the risk of yielding inaccurate results—presenting a positive outcome in the absence of an actual allergy or a negative result despite its presence. Such instances can detrimentally impact one’s quality of life, potentially causing unnecessary lifestyle adjustments (like avoiding certain foods) or instigating unwarranted anxiety. In more severe cases, it could even lead to life-threatening anaphylactic shock. The significance of an ALEX Allergy test lies in its ability to precisely identify the specific allergen. Once identified, a healthcare professional can then provide tailored recommendations for effectively managing the allergy.

Who should have an ALEX® Allergy test?

The ALEX Allergy test becomes necessary when there are indications of allergic symptoms. These symptoms encompass:

  1. Respiratory symptoms (e.g., hay fever/allergic rhinitis), which may manifest as a blocked or runny nose, sneezing, coughing, wheezing, breathlessness, and itchy red watering eyes.
  2. Gastrointestinal symptoms (e.g., cow’s milk allergy), involve vomiting, diarrhoea, abdominal cramps, and irregular bowel movements.
  3. Skin symptoms (e.g., atopic dermatitis/eczema), are characterized by itchy, red, swollen, and peeling skin areas.

Blood IgE allergy tests are commonly employed when traditional allergy skin testing is impractical. This could be the case when a person is on medication that could influence test results and cannot discontinue the medication, has a skin condition that hinders accurate assessment, experiences urticaria upon skin scratching, or faces the potential for a serious allergic reaction to the allergens being tested.

Furthermore, blood IgE allergy tests may be preferred over challenges, where incremental doses of a potential allergen (e.g., a food or medicine) are administered. These challenges are closely monitored by a doctor due to the risk of a severe allergic reaction.

How to test for an Allergy with the ALEX® Allergy test?

The ALEX® Allergy test checks for allergens using a small blood sample. We collect the sample from you at our clinic. The results typically take up to 10 days and are sent directly to you through secure email. The Alex test results will tell you if you have allergies and specify what you’re allergic to. This can be taken to your GP or doctor for further interpretation.

What are normal ALEX® Allergy test results?

The ALEX® Allergy test results will indicate the total IgE level in the blood. If the total IgE level is below 20 kiloUnits per liter (kU/L), it suggests that an allergy is unlikely. An IgE level between 20 and 100 kU/L suggests a possible allergy, while a total IgE level exceeding 100 kU/L indicates a likely allergy.

The test also reveals the IgE concentration for each allergen, reported as Grades from 0 to 4 and in kilo Units of allergen per liter (kUA/L). Here’s a breakdown:

  • Grade 0 (negative or uncertain): Concentration below 0.3 kUA/L
  • Grade 1 (low IgE level): Concentration 0.3 to 1 kUA/L
  • Grade 2 (moderate IgE level): Concentration 1 to 5 kUA/L
  • Grade 3 (high IgE level): Concentration 5 to 15 kUA/L
  • Grade 4 (very high IgE level): Concentration above 15 kUA/L

Furthermore, the test identifies allergens with cross-reactivity, attributed to the presence of the PR-10 protein.

How to minimise the risk of allergy symptoms

Allergies often have a hereditary component, so parents can anticipate potential allergies in their children. Infants should be exclusively breastfed or given hydrolyzed milk formulas for the first six months to lower the risk of early-age allergies. Afterwards, a diverse range of baby foods can be introduced, including those known to cause allergies. Having a pet dog or cat during the first year of life may also offer some protection against allergies.

Once an allergen is identified, avoiding exposure to that specific trigger involves preventing an allergic reaction. Here are some preventive measures:

  1. Food Allergies:
    • Check food labels and ingredient lists for allergens.
    • Notify restaurants about allergies when dining out.
  2. Dust Mites:
    • Opt for wooden or tiled flooring over carpets.
    • Regularly wash bed linens, vacuum soft furnishings/toys, wipe surfaces, and use air filters.
  3. Pets:
    • Regularly clean and groom pets to minimize allergens from dead skin, fur, saliva, and urine.
  4. Mould Spores:
    • Keep rooms dry and well-ventilated to prevent mould growth.
  5. Pollen Allergy:
    • Apply Vaseline around nostrils to trap pollen.
    • Wear sunglasses, check pollen counts in weather reports, and stay indoors during high counts.
  6. Insect Stings and Bites:
    • Use insect repellents and minimize skin exposure.

In addition to these measures, a doctor may recommend medications like antihistamines, decongestants, lotions/creams, steroids, or allergen immunotherapy (previously known as desensitization) to increase tolerance to specific allergens.

For individuals experiencing anaphylaxis, immediate treatment is crucial. Adrenaline auto-injectors are prescribed for those at risk and should be carried out at all times. Adrenaline acts quickly, opening airways, reducing swelling, raising blood pressure, and relieving hives and gut symptoms. Auto-injectors must be used at the first signs of a severe allergic reaction, with an ambulance called immediately afterwards.

Why choose us?

We are a multi award winning clinic based in London, with awards from Whatclinic clinic of the year, GHP outstanding patient care and LUX best private ultrasound provider to name a few. Our clinical lead Mr. Usman is well known and respected in the industry and has been featured in the Huffington Post and performed scans live on ITV.

We pride ourselves on providing the best quality service we can which is why we are trusted by GP's, doctors, physiotherapists, midwives and many other healthcare professionals.

Our mission of better quality healthcare for everyone is at the heart of everything we do and drives us to do the best we can for each and every patient that we see. Our team of experts have years of experience and are fully registered and regulated meaning you are in safe hands with us.

Biomarker information for Alex Allergy Test London – 300 Allergens blood test

This blood test includes the biomarkers shown below along with information about each biomarker.

What does the Alex Allergy Test London – 300 Allergens blood test involve?

This blood test is just like a standard blood test.

You will be asked to uncover you left or right arm and suitable vein is found. A tourniquet will be placed and tightened around your upper arm allowing the veins to swell and a needle will be placed into your vein. A small quantity of blood is then drawn into tubes. Once the procedure is complete a small plaster will be placed onto the site which can be removed after a few hours.

How do I prepare

  • The blood test requires access to the area of interest, therefore, it is recommended to wear loose clothing to facilitate this process.
  • No specific preparation is required for this test.

Our Reviews

HCT iBusHCT iBus
11:46 02 Dec 23
A great service that delivers in a clean and friendly safe environment that delivered exactly what... we needed for our peace of mind. Really expert information and friendly service from start to finish. Will recommend to all friends and more
Candice UghaonuCandice Ughaonu
11:28 03 Oct 23
Great team and the Doctor was super friendly, very detailed and reassuring. He answered all my... questions and concerns. I left feeling much better. I have used them many times and will use again if required in future. Definitely recommend!read more
Gemma KGemma K
11:39 22 Jul 23
I came here for my first child’s gender reveal 3 years ago and the treatment hasn’t changed. The... service is still amazing, the doctors and staff were so welcoming and kind. The doctor took his time to explain the scan to me and checking the baby. The facility is very soothing and relaxing. What an amazing team. May God bless themread more
15:18 12 Jul 23
I recommend this clinic from my heart , the doctor and assistent was so kind and they make me feel... very confortable while on the procedure , nothing to complain, everything perfect . I will go to this clinic again if i will need it for sure .read more
Violeta GugleaVioleta Guglea
17:16 17 Jun 23
I have used the this clinic at the recommendation of my friend who had a positive experience. I... have used this clinic looking for reassurance before my gallbladder removal operation. The appointment was quickly booked for the next day to suit my needs. The scan was performed by a very well spoken, professional person. The whole experience was very positive, as expected from a private clinic. From the experience I have had, I can highly recommend this more
aditya gandhiaditya gandhi
16:08 12 Nov 22
Today me & my wife had 2nd visit of scan clinic. I must say our both visit of scan clinic are much... satisfactory. We were welcomed by miss Zeenat. She was very polite and professional throughout. Scan performed very well & explained as well. Scan clinic deserves thumbs more
ruth raeruth rae
15:21 07 Sep 22
I booked an early scan here and I had a great experience. All the staff were amazing and friendly.... The Sonographer was great, really made me feel at ease. I would highly recommend this more
Tiziana MonnoTiziana Monno
08:10 18 Aug 22
Beautiful experience! I was 31 weeks pregnant and a little worried about my little girl's position.... I was so patiently confirmed by the doctor and informed us of the growth. My partner and I were more than satisfied. Professionalism and kindness they made me feel more
Lina ZhangLina Zhang
10:55 16 Aug 22
I've been to this clinic 4 times over the past 7 years for both pregnancy scans and health scans.... What sterling services they consistently provide! Booking is always easy either online or over the phone, minimum waiting time, and calming environment. What's most impressive is that Mr Usman always explained the scan results thoroughly in a calm and professional way on site and in a report, and quickly spotted issues that both my hospital scan and community clinic scan completely missed (the sonographer at the hospital even asked where I did my scan as she was impressed)! This helped me eventually get timely referral and free from lots of stress. I always feel being well looked after by the team and will wholehearted recommend them to anyone who is looking for efficient, caring and professional more
sannndra Ruizsannndra Ruiz
09:25 06 Aug 22
Great treatment, it's the second time we've been here and we plan to repeat the whole pregnancy.... They revealed the gender of the baby in week 16 and the doctor is super careful and delicate, a 10 out of more

Important Notes

  • We may require details of your GP / Health Care Professional before or at the time of the test.
  • Blood results require interpretation. All results should be interpreted by your regular health care professional / GP.

Fact Check Information

The Scan Clinic is committed to providing accurate and objective educational content about health and medical related topics. We know that there is a lot of misinformation out there, and we take our responsibility to be a trustworthy source of information seriously. Every article on our site is thoroughly fact-checked by our team of writers.

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