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Intolerance Test

63 Common Items Tested

From £135.00£105.00

Our exclusive Intolerance Test screens 63 common food intolerances. This easy-to-use blood-spot test will provide information on food reactions and assist in a food-elimination diet. If you suffer from symptoms like bloating, IBS, headaches or fatigue this test is a great first step to understanding more about your body.

  • 63 intolerances tested (food & drink)
  • Includes Egg, Dairy, Meat, Wheat & Fish
  • Lab results within 3-5 days
  • CE & UKCA collection kit and free return envelope
  • No reaction money-back guarantee

Your intolerance test kit will be shipped free with 48-hour tracked delivery. Complete the activation, enclose a sample and return it in the pre-paid envelope. Your results are processed in our labs and sent to your email and the Healthy Stuff app. If you have no reactions, you receive 100% of your money back!

Upgrade to our Allergy & Intolerance Test for an extra £14.00!

SAVE with our couples (x2) and family (x4) bundles!

Save money and get tested all at once with our couples & family options.

SKU: intolerancescreen-BB Categories: , Tag:

CE marked kit

Fast results

FREE 48 hours tracked delivery

Secure process

SAVE with bundles

1,000,000+ customers

Our exclusive Intolerance Test screens 63 common food intolerances. This easy-to-use blood-spot test will provide information on food reactions and assist in a food-elimination diet. If you suffer from symptoms like bloating, IBS, headaches or fatigue this test is a great first step to understanding more about your body.

Our expert team of intolerance technicians and lab managers have over 20 years of combined experience in allergy & intolerance testing and work from our category 2, ISO9001 accredited allergy and intolerance testing laboratory.

What your test will include:

  • 63 common food intolerances including Wheat, Dairy, Egg, Meat, Fish and Vegetables.
  • A CE and UKCA-approved blood-spot collection kit shipped free and including a free return envelope.
  • Results processed in our labs in 3-5 business days and sent direct to you.


No-risk money-back guarantee:

All of our Intolerance Tests include a money-back guarantee if your results show no reaction. This means if you receive your validated results and the test has found no raised IgG4 levels against the items we test, you will receive a full refund allowing you to continue your health journey without being out of pocket.

How the intolerance test works:

Using ELISA testing for raised IgG4 antibodies, this blood spot test offers accurate lab results to enable you to adjust your diet to reduce or avoid triggers.

Raised IgG4 (Immunoglobulin G) antibodies can indicate a food intolerance. IgG4 responses are more common than IgE (allergy), which causes an immediate reaction. Food intolerance reactions can be more difficult to self-diagnose since symptoms can occur hours or even days after consumption of an offending food.

Bundle and save:
Also available for 2 people as our Intolerance Test Couples or 4 people in our Intolerance Test Family bundles.

How to order:

Add your chosen intolerance test and number of kits to the basket and complete the secure online payment. You will receive a blood-spot sample collection kit at your mailing address, which will require activation. Take your blood sample and return it to our laboratories in the pre-paid envelope provided. Once our lab receives your blood sample, you will be notified by email and via the app. Our lab will process your test within 3-5 business days, you will receive your results in an email and on the app.


Your purchase will be processed immediately and dispatched on the same day if ordered before 12pm and next day if ordered after this time. Your kit will be shipped 48-hour tracked delivery by Royal Mail.

Food Intolerance Symptoms:

Our intolerance test can help you identify the triggers related to digestive symptoms associated with food intolerances. This information can then be used to remove or reduce contact with these items or seek a further medical investigation. Common symptoms of food intolerance include:

  • Bloating
  • Fatigue
  • Nausea
  • Stomach cramps
  • Loose stools


Discover if food intolerances are the causes of your symptoms in this fast and easy-to-use intolerance test today.


All of our blood kits are UKCA and CE marked.

UKCA label CE marking

The UKCA and CE markings are labels to display that our blood kits comply with regulatory requirements.

Items included within our Intolerance test:

  • Almond
  • Amaranth
  • Apple
  • Banana
  • Barley
  • Bean, Green
  • Beef
  • Blue Mussel
  • Buckwheat
  • Button Mushroom
  • Cabbage
  • Cacao
  • Carrot
  • Celery
  • Chicken
  • Cod
  • Coffee
  • Cucumber
  • Duck
  • Durum Wheat
  • Egg White
  • Egg Yolk
  • Garlic
  • Ginger
  • Gluten
  • Goats Milk
  • Hazelnut
  • Herring
  • Kiwi Fruit
  • Lemon
  • Lentil
  • Maize
  • Milk
  • Mustard
  • Oat
  • Olive, Green
  • Onion
  • Orange
  • Oyster
  • Pea, Green
  • Peanut
  • Pineapple
  • Pollock
  • Pork
  • Potato
  • Pumpkin Seed
  • Quinoa
  • Rice
  • Rye
  • Salmon
  • Sheep’s Milk
  • Shrimp
  • Soy
  • Strawberry
  • Sunflower Seed
  • Sweet Basil
  • Tomato
  • Trout
  • Tuna
  • Turkey
  • Walnut
  • Wheat
  • Zucchini

Receive your testing kit in the post.


Clean your finger and use the finger prick to take your sample.


Fill the blood spot card with your sample.


Send your sample to our labs for testing.

The Science

This test uses the IgG4 in your blood sample for intolerance testing, but what does that mean?

IgG and IgE antibodies play an important role in our immune system. The immune system helps our body to fight infections and inflammation caused by external invaders known as antigens like viruses, bacteria, parasitic worms and proteins. We have four classes of IgG antibodies: IgG1, IgG2, IgG3 and IgG4(1). For the Intolerance Test, we are using IgG4 to help us in the identification of those non-immunological responses that can be the cause of common symptoms like: bloating, headaches, stomach pains and diarrhoea.

Why IgG4?

The IgG4 antibodies can influence the inflammatory response but not activate it. We are using IgG4 in our intolerance tests because we are investigating delayed symptoms that could be associated with food and non-food intolerances (1,2). These do not cause an immediate immunological response, however, could still be causing you problems. For food intolerance, the presence of specific IgE and IgG antibodies can be observed. Some subclasses of IgG (mainly IgG4) inhibit the degranulation of basophils and mast cells and the activation of the complement cascade (2).

At Test Your Intolerance, we use IgG4 exclusively for qualitative intolerance testing. Our tests are not used for the diagnosis of acute or chronic food intolerances; however, we are helping you to draw a map of the reactions that could be the cause of your symptoms. 60% of the world’s population suffers from food intolerance to at least one food antigen. This test is not a quick fix but can help you in your journey to find a better version of yourself. To find out more about the science of IgG4 testing, click here.


1. Aalberse RC, Stapel SO, Schuurman J, Rispens T, Immunoglobulin G4: an odd antibody. Clin Exp Allergy. 2009; 39(4): 469-77.
2. Velikova T et al. Methods for detection of food intolerance. RAdvFoodSci: 2018: 1(3): 106-119

What’s inside the testing kit?

1 x Alcohol wipe
1 x Band-aid
1 x Absorbent pad
1 x Six Spot Blood Card
2 x Lancets CE 0344 (pin-prick system)
1 x Return envelope
1 x Activation card with an adhesive label

  • Removal of raised IgG4 items may improve lifestyle based on testimonial evidence.
  • CE approved sample collection kit.
  • Results do not constitute a medical diagnosis on their own, but may be used by your doctor or nutritional therapist to help form a diagnosis or rule out a condition.
  • Quantitative data using an ELISA testing methodology. All values measured in Kilounits per antigen per litre (KUA/L), our scale uses a universal cut off point of 0.35 in classifying a reaction.
  • >97% reproducible results. IgG4 values may change over time with diet.


Blood (ELISA) tests define an intolerance/sensitivity as a specific IgG4 antibody reaction and an allergy as a specific IgE antibody reaction (IgE-Mediated).

All information in the reports produced is intended to support nutritional advice to optimise your diet. The results cannot be used to diagnose, treat or cure medical/health conditions.

The use of antihistamines prior to or during the blood sample collection process may affect your results, please contact our team for further advice.

Always seek the advice of your doctor or other qualified health providers if you have a medical condition and/or medical symptoms. Never disregard professional medical advice or delay in seeking it.

  • Same day dispatch on orders placed by midday
  • Easy return envelope enclosed with your kit
  • 14-day cancellation period if you change your mind
  • Fast track option available at the checkout, get your blood results within 48 hours of your sample arriving at our laboratory
  • Nutritional therapist sessions available at the checkout are used to discuss your results.

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