Food & Drink Intolerance Test
Food & Drink Intolerance Test
Food & Drink Intolerance Test
Food & Drink Intolerance Test
Food & Drink Intolerance Test
Food & Drink Intolerance Test
Food & Drink Intolerance Test
Food & Drink Intolerance Test
Food & Drink Intolerance Test

Recommended by professionals:

“When you’re experiencing ongoing symptoms such as bloating, digestive discomfort, fatigue or brain fog, it isn’t always easy to understand whether something in your diet could be playing a role. An IgG food intolerance test can provide additional information to help guide more informed dietary decisions and identify foods that may be worth exploring further.”

Dr Gareth James

MBBS, DRCOG, DFFP, MRCGP

9,000+ 5-star reviews

Food & Drink Intolerance Test

Explore your results from home with our 89-food and drink IgG blood test, part of the Affordable Health range at just £99.99. Collect a simple finger-prick sample and receive a clear digital report showing your measured IgG levels for 89 everyday foods and drinks, typically within 3 working days of your sample reaching UK lab. Every test includes a free 30-minute consultation with a certified Nutritionist which gives you the chance to discuss your results and ask questions. You can also choose to pay in instalments at checkout.
€119,99
American Express Apple Pay Diners Club Discover Google Pay Maestro Mastercard PayPal Shop Pay Union Pay Visa
Home-to-lab fast results

Home-to-lab fast results

FREE shipping

FREE shipping

100% confidential service

100% confidential service

Certified lab testing

Certified lab testing

Home-to-lab fast results

Home-to-lab fast results

FREE shipping

FREE shipping

100% confidential service

100% confidential service

Certified lab testing

Certified lab testing

Food-related symptoms can be difficult to pinpoint and may develop gradually rather than immediately after eating. If you regularly experience bloating, digestive discomfort, fatigue, headaches, brain fog or skin concerns, understanding how your body may be responding to different foods can provide a useful starting point.

One way of exploring this is by measuring food-specific IgG (Immunoglobulin G) antibodies. IgG is the most abundant type of antibody in the blood and forms part of the immune system’s response to substances it encounters, including foods.

Using a simple finger-prick blood sample, this Food Intolerance Test measures your IgG response to 89 everyday food and drink ingredients, helping highlight foods that may be worth exploring further as part of a structured elimination and reintroduction approach.

Your results are provided in a clear digital report, with each food categorised from Class 0 (No Reactivity) to Class 4 (Very Strong Reactivity), making it easy to see your individual levels of reactivity.

You’ll also receive a FREE 30-minute 1-to-1 consultation with a certified Nutritionist, giving you the opportunity to discuss your results, ask questions and get practical guidance on your next steps.

At just £99.99, this test is part of our Affordable Health range, created to make exploring your health more accessible and affordable. With the option to pay in instalments, it’s easier than ever to take that first step.

Who is this test for?

If you regularly experience bloating, digestive discomfort, low energy or other ongoing symptoms that you can’t quite explain, something in your diet could be contributing.

Food-related symptoms aren’t always immediate or obvious. They can develop gradually, come and go, or leave you wondering why you don’t quite feel your best. If you’ve started questioning whether certain foods could be connected to how you feel, exploring your individual food reactions could help you take the next step.

You may benefit if you experience:

Bloating

Bloating

Stomach pain or digestive discomfort

Stomach pain or digestive discomfort

Tiredness or fatigue

Tiredness or fatigue

Brain fog

Brain fog

Skin concerns

Skin concerns

Headaches

Headaches

Order test now

How does it work?

Activate your test online
Take your blood sample
Send your blood sample to our laboratory
Receive your results

What’s tested

View sample report

Frequently asked questions

Food & Drink Intolerance Test FAQs

Did you know?

76% noticed an improvement

More than three quarters of customers reported an improvement in their symptoms after removing foods flagged in their results.

68% felt better within 3 weeks

Of those who experienced an improvement, 68% noticed a difference within just three weeks.

92% saw symptoms return

When reintroducing flagged foods, 92% of respondents who had experienced an improvement reported that their symptoms returned.

14 million people

An estimated 14 million people in the UK experience reactions to foods.*

Survey commissioned by Allergy UK of 5,286 participants. Participants questioned three months after IgG food testing. (BDA, 2015)

Quality you can trust

All our labs or partner labs hold UKAS, ISO9001, ISO13485, ISO15189 or ISO17025 accreditations.
ISO compliant
UKAS accredited labs
Gold Standard Microarray Technology
Tested in UK lab
Certified Nutritional Therapists
IgG classes 1, 2, 3, 4 tested. Our most advanced test

Expert insight, clearer next steps

IgG food intolerance testing measures food-specific IgG antibodies in the blood, helping to identify foods that may be worth exploring as part of a structured elimination and reintroduction approach.

When symptoms such as bloating, digestive discomfort, fatigue or brain fog keep occurring without an obvious explanation, understanding how your body may be responding to different foods can provide a useful starting point for making more informed dietary decisions.

“When you’re experiencing ongoing digestive discomfort, low energy or other unexplained symptoms, it can be difficult to pinpoint whether something in your diet could be playing a role.”

“Food intolerance testing can provide useful insights into how your body may be responding to different foods, giving you a clearer direction for a structured elimination and reintroduction approach.”

“The important part is what happens after the test. Using your results alongside your symptoms can help you make considered dietary changes, rather than unnecessarily removing foods without a clear plan.”

Dr Gareth James
Medical Director | MBBS, DRCOG, DFFP, MRCGP

More than just a test

Understanding your results is only the beginning. Your Food & Drink Intolerance Test includes expert support to help you feel confident about what comes next, from understanding your results to making practical, considered changes to your diet.

Included with your test:

  • 30-minute nutritionist consultation
    Discuss your personalised results, ask questions and receive practical guidance tailored to your diet, symptoms and individual needs.
  • Personalised elimination guidance
    Get support with using your results to identify which foods to explore and how to approach elimination and reintroduction in a structured, manageable way.
  • FREE 1-month meal planner access
    Make dietary changes easier with meal-planning tools, recipes and nutritional support to help you plan meals around your individual results.
  • Support that goes beyond your report
    We don’t believe testing should end with a PDF. Our goal is to help you feel informed, supported and more confident about the dietary choices you make after receiving your results.

Accessible testing, powerful insights - all from home

Meet Molly, one of our fully qualified Nutritional Therapists

See how easy it is to take our test at home

Approved by registered doctors and nutrionists

Dr Gareth James

MBBS, DRCOG, DFFP, MRCGP

Sian Baker

Dip ION mBANT mCNHC

Jaci Salley

CNTP

Ruby Saharan

B.Sc., M.Sc., INHC

Dr. Christopher Holet

DC

Dr. Suzanne Vester

BND, Ph.D.

Dr. Bryce Calvillo

Health & Wellness Practitioner

Mazvita Raphael

RN, CNS, BSc (Hons)

Understanding the differences between food reactions

Allergy, intolerance, and sensitivity are often used interchangeably — but they’re not the same. Each involves a different type of reaction in your body, and understanding the difference is key to managing your symptoms effectively.

Food intolerance

Food intolerances trigger a different kind of immune response than food allergies.

Although the exact science isn’t fully understood, research suggests that IgG antibody reactions may play a role in symptoms for some people. When combined with an elimination diet, IgG testing can help identify foods that may be causing inflammation-related issues.

Unlike allergies, which cause immediate reactions, symptoms of food intolerances often show up hours or even days later — making it much harder to connect the dots without testing.

Common symptoms reported by our customers include:

• Headaches
• Bloating
• Stomach pain
• Indigestion
• Gastrointestinal discomfort

Food allergy

Food allergies trigger an immediate immune reaction involving IgE antibodies. When someone eats a food they’re allergic to, their immune system releases histamine, which can cause symptoms like:

• Swelling
• Itching
• Hives
• Trouble breathing
• In severe cases, anaphylaxis

This is why many allergy medications are called antihistamines — they work by blocking the effects of histamine.

For example, tree nut allergies (to foods like hazelnuts, walnuts, or macadamia nuts) can cause severe, life-threatening reactions. Anaphylaxis can occur within minutes of exposure, potentially leading to a dangerous drop in blood pressure or airway swelling that makes it hard to breathe.

Sensitivities

Food sensitivities happen when your body struggles to process certain foods, often because they are difficult to break down in the digestive system.

Unlike food allergies or intolerances, sensitivities don’t involve the immune system. Instead, they mainly affect how well your digestive system can handle specific foods.

A common example is caffeine sensitivity.

Caffeine is found in coffee, tea, and energy drinks. Some people break it down more slowly, which can lead to symptoms such as:

• Jitters or restlessness
• Rapid heartbeat
• Trouble sleeping
• Stomach discomfort

While food sensitivities aren’t typically dangerous, they can still cause significant discomfort and affect your daily wellbeing if left unmanaged.

Join 1 million+ people who have received our support or advice

The people’s
choice with over
9,000+
5-star reviews

The people’s choice with over
9,000+ 5-star reviews

Everything was done very quickly!

Everything was done very quickly! The emails and communication before and after the test being taken was fast.

Yasmin Begum (December 2025)

VERIFIED

Detailed Information!

It was super easy to send in my hair and I got the results quicker than I was told. This test confirmed a lot for me. I was already gluten...

Sarah Nolan (December 2025)

VERIFIED

Really easy to get tested

Really easy to get tested.. clear simple instructions and super quick results

Chloe Harris (December 2025)

VERIFIED

Was kept up to date via email...

Was kept up to date via emails as to the progress of samples. Results very thorough

Rosie Hawke-Fitzhardy (December 2025)

VERIFIED

I’ve struggle with food sensitivities...

I’ve struggle with food sensitivities for a long time. This has taken all the guess work out and now I am getting better results. I’m feeling much better. Thanks

Sunny G (December 2025)

VERIFIED

Rapid service, and great price!

Bought my whole family a test for Christmas! I bought one for myself first and was happy with the whole process, I then got one for my boyfriend and that...

Clarissa (December 2025)

VERIFIED

Excellent and quick service with a...

Excellent and quick service with a detailed list of everything from low risk to high risk foods and other things. Yes seems very good and will use it alongside my...

Dan Walker (December 2025)

VERIFIED

This gives great insight into body...

This gives great insight into body health and what impacts it. There were some issues that I already knew, but a lot I didn't. Excellent value for money. Quick and...

Glenise Elisabeth Daniels (December 2025)

VERIFIED