Intolerance Screen Blood Test
Intolerance Screen Blood Test
The Intolerance Screen Blood Test is a specialised diagnostic tool designed to evaluate your body’s immune response to a range of common food proteins. Unlike classic food allergies, which trigger immediate, often severe reactions, food intolerances typically lead to delayed symptoms that can be harder to trace—such as bloating, fatigue, skin issues, migraines, and digestive discomfort. These reactions are often driven by non-IgE immune pathways and may emerge several hours or even days after eating a problematic food.
This blood test analyses immunological markers associated with food intolerance, helping to identify the foods most likely contributing to chronic inflammation, digestive imbalance, or systemic symptoms. Clinical studies, including those published by researchers at the University of York and King’s College London, have shown that removing foods identified through intolerance testing can improve symptoms in conditions such as irritable bowel syndrome (IBS), migraines, eczema, and fatigue-related disorders.
By identifying hidden food triggers and low-grade immune responses, this test offers a foundation for creating a personalised elimination diet, supporting gut health, reducing inflammation, and improving overall well-being.
What Does This Test For?
This test investigates your body’s immune response to a range of common dietary proteins by measuring markers associated with food intolerance. It helps to identify which foods may be contributing to subtle or delayed symptoms that can affect digestion, mood, energy levels, skin health, and systemic inflammation. Unlike allergy testing, which focuses on rapid-onset IgE-mediated responses, this screen focuses on delayed hypersensitivity and low-grade immune reactions, commonly associated with non-IgE pathways such as IgG4 or T-cell activation.
This type of intolerance testing is particularly useful for individuals suffering from chronic conditions like bloating, IBS, unexplained fatigue, eczema, headaches, or joint pain, where conventional diagnostic tests may show no abnormalities. Identifying and removing trigger foods can lead to measurable improvements in symptoms and quality of life, as supported by recent clinical trials published in the Journal of Inflammation Research and Clinical Gastroenterology and Hepatology.
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Biomarkers
Biomarkers
How to take a test
How to take a test
This simple home blood test uses a small finger-prick sample and a lancet device. Collection takes just a few minutes, and results are usually ready within 24–48 hours once your sample reaches the laboratory. Note: This guide is for informational purposes only and not a substitute for professional medical advice. Always follow the instructions provided with your specific test kit. How to Do a Home Finger-Prick Blood Test
Step What to Do What You’ll Need Time 1. Order your test online. Your kit includes lancets, collection tube, alcohol swab, plasters, instructions, and a pre-paid return mailer. Home test kit 1–2 mins 2. Register your test kit using the unique reference number printed on your kit. Enter this number in your online portal before collecting your sample to ensure results are linked correctly. Reference number, online portal 2–3 mins 3. Read the instructions carefully. Hydrate and warm your hands in warm water to help blood flow. Warm water, instructions 3–5 mins 4. Clean one fingertip with the alcohol swab. Twist and press the lancet firmly until it clicks. Lancet, alcohol swab < 1 min 5. Gently massage from your palm toward the fingertip to form blood drops. Let drops fall into the collection tube up to the marked fill line. Collection tube, tissue 2–5 mins 6. Seal the tube tightly, label it, and complete any included forms. Place everything into the protective packaging. Tube cap, label, form 1–2 mins 7. Post your sample using the pre-paid return mailer the same day. Aim to post Monday–Thursday to avoid weekend delays. Pre-paid mailer 1–3 mins 8. The laboratory processes your sample upon arrival. Results are typically ready in your online account within 24–48 hours. Online account Varies
Delivery & Returns
Delivery & Returns
Shipping Information
If you order by 2 p. m. on a weekday, your order will be packaged that day.
If orders come in after 2 p. m., they'll be packed the following workday. Spend over £50 and enjoy free shipping anywhere in the UK.
To ensure your items get to you safely and on time, we usually send them out using trusted courier services, although Royal Mail may also be used.
Most of our customers receive their orders within 1–3 days of sending; however if you reside in an area which is considered remote or lies far away from us, then please bear with us should it take an extra day or two for your parcel to reach you.
When your order is dispatched, you'll get an email telling you this– and if there's tracking available, it'll be included too!
Returns Policy
Our products are meant to empower you regarding your health care; therefore returns are easy and without any cost to you.
You can return your purchase free of charge within 30 days of receiving it back to us in England.
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
Clients Love Us
Stephanie L.
"The process was quick and easy. I had results back in two days with helpful insights from a doctor."
Armac Venson
"Everything arrived on time, and the packaging made it feel very professional and secure. Very impressed."
Rachel M.
"Excellent service from start to finish. The instructions were clear, and I felt supported throughout."
Anna Jackobson
"Simple to use and great customer service. I got peace of mind without leaving my house."
Eric X.
"I appreciated how discreet and well-packaged everything was. Made the whole process stress-free."
Anders Elroff
"I’ve tried other services, but none matched the speed and clarity I got from this test. Highly recommend."
How it Works
Order Your Test
Choose your test online and we’ll send you everything you need.
Take Your Sample
Use the simple finger-prick kit to collect your blood sample at home.
Post It Back
Return your sample in the prepaid envelope — no need to visit a clinic.
Get Reviewed Results
Your results are reviewed by a qualified lab technician and delivered securely online.
FAQ's
Do I need to visit a clinic to take the test?
Do I need to visit a clinic to take the test?
No — our tests are designed to be done entirely at home using a simple finger-prick kit. Just follow the instructions and post your sample back using the prepaid envelope.
How long do results take?
How long do results take?
Once your sample reaches our lab, results are usually available within 1–2 working days. You’ll be notified by email and can view everything securely online.
Are these tests verified and reliable?
Are these tests verified and reliable?
Yes. All our tests are processed in UKAS and ISO-accredited laboratories. Our clinical team includes NHS doctors, GPs, and registered nurses, ensuring medical accuracy and professional oversight.