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Food Allergy Test

Food Allergy Test

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  • 6. Over 22 million patients treated with semaglutide-based therapies since 2018

  • ✔️ Screens IgG reactions to over 200 foods and drinks
  • ✔️ Simple finger-prick sample collected at home
  • ✔️ Results delivered digitally within 7–10 days
  • ✔️ Helps identify dietary triggers for bloating and fatigue
  • ✔️ No GP referral or clinic appointment required

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What Is a Food Allergy Test and How Can It Help You?

 

Living with unexplained bloating, persistent fatigue, skin flare-ups, or recurring headaches can be exhausting — especially when you have no idea what is causing them. The food allergy test from YorkTest is designed to help you identify whether specific foods or drinks may be triggering an IgG antibody reaction in your body. It is a simple, at-home finger-prick blood test that you complete in your own time, with no clinic appointment needed. If you have been struggling to pinpoint the root cause of ongoing symptoms, this kind of testing can be a genuinely useful starting point. You can also explore our allergy and hay fever range for additional support products alongside your test.

It is worth being clear about what this test does and does not do. It screens for IgG antibody reactions — not IgE-mediated true allergic responses, which are the type associated with anaphylaxis. IgG reactions are generally linked to food intolerances rather than classic allergies, and symptoms tend to be delayed and more subtle. The NHS notes that food intolerance is far more common than true food allergy, and symptoms can include digestive discomfort, skin problems, and low energy.

 

How Does the YorkTest Food Allergy Test Work?

 

The science behind this test centres on immunoglobulin G (IgG) antibodies. When your immune system reacts to certain food proteins, it can produce IgG antibodies as part of its response. YorkTest's laboratory uses an ELISA (enzyme-linked immunosorbent assay) method to detect and measure these antibodies across a wide panel of foods and drinks.

  • You register your kit online using the unique code provided.
  • A small finger-prick blood sample is collected using the lancet included in the kit.
  • The blood is applied to the collection card and sealed securely.
  • You return the sample using the prepaid envelope to YorkTest's accredited laboratory.
  • Results are analysed and delivered digitally, usually within 7–10 days of receipt.
  • A detailed results report highlights any foods showing elevated IgG reactions.

 

Who Should Consider Using This Food Sensitivity Test?

 

This test is particularly suited to adults who have been experiencing unexplained, recurring symptoms without a clear diagnosis. It is not a replacement for a GP consultation, but it can provide a useful evidence base to take to your doctor or a registered dietitian. It is not appropriate for individuals who have already been diagnosed with a severe IgE-mediated food allergy — those cases require specialist management.

  • Adults with persistent bloating, wind, or digestive discomfort
  • People experiencing unexplained fatigue or brain fog
  • Those with recurring skin issues such as eczema or rashes with no identified cause
  • Individuals who suspect certain foods are affecting their wellbeing but lack clarity

 

How Does the YorkTest Food Allergy Test Compare to NHS Testing?

 

Feature YorkTest Food Allergy Test NHS GP-Referred Testing
Test type IgG antibody (food intolerance panel) IgE skin prick or specific IgE blood test
Access At-home, no referral needed Requires GP referral
Turnaround 7–10 days from sample receipt Varies; can take several weeks
Foods tested Wide panel (200+ foods and drinks) Targeted to suspected allergens only

 

Is the YorkTest Food Allergy Test Suitable for Everyone?

 

The food allergy test is intended for adults aged 18 and over. It is not recommended for use during pregnancy without prior discussion with a GP or midwife, and it is not designed for children under 2 years of age. If you are currently taking immunosuppressant medication, your IgG antibody levels may be affected, which could influence results — speak to your pharmacist or GP before proceeding. Those with a known history of anaphylaxis should not rely on this test and should seek specialist allergy clinic assessment instead.

Store the kit at room temperature, away from direct sunlight and moisture. Once you have collected your sample, return it promptly — ideally the same day or the following morning — to ensure sample integrity. If you are managing related digestive symptoms, our IBS and cramps collection may offer additional support while you await your results.

This product is a medicine. Speak to your doctor or pharmacist before using if you have an underlying medical condition or are taking other medicines.

YorkTest Food Allergy Test specifications
Treatment category Diagnostic / Food intolerance testing
Mechanism of action Measures IgG antibody reactions to food and drink antigens via ELISA methodology
Effective for Identifying potential IgG food sensitivities linked to intolerance symptoms
Suitable for Adults aged 18 and over experiencing unexplained food-related symptoms
Active ingredient N/A — diagnostic test kit
Pack size 1 test kit (includes lancet, collection card, prepaid return envelope)
UK classification General sale / consumer diagnostic
Preparation Finger-prick blood sample collection
Route of administration Finger-prick blood sample (returned by post to laboratory)

Specifications of YorkTest Food Allergy Test

 

What Is the YorkTest Food Allergy Test and What Is It Used For?

 

The YorkTest Food Allergy Test is an at-home diagnostic kit that measures your IgG antibody response to over 200 foods and drinks. It is used to help identify potential food intolerances — not true IgE-mediated allergies — that may be contributing to symptoms such as bloating, fatigue, skin irritation, headaches, or joint discomfort. The NHS distinguishes clearly between food allergy and food intolerance: a true allergy involves an immediate immune response, whereas intolerance symptoms are typically delayed and less severe. This test is designed to support that second category.

Results are delivered as a detailed report indicating which foods showed elevated IgG reactions, categorised by reaction level. This information can then be used — ideally alongside a registered dietitian — to guide a structured elimination and reintroduction diet. It is a starting point for investigation, not a standalone diagnosis.

 

What Do You Need to Know Before Using the YorkTest Food Allergy Test?

 

Before using this test, there are some important considerations to be aware of. The test is not suitable for everyone, and certain conditions or circumstances may affect the reliability of your results.

Do not use this test if:

  • You have a known history of anaphylaxis or severe IgE-mediated food allergy — seek specialist allergy clinic assessment instead
  • You are under 2 years of age
  • You are currently taking immunosuppressant medication, as this may suppress IgG antibody levels and affect results
  • You are pregnant — consult your GP or midwife before proceeding
  • You have a bleeding disorder or are taking anticoagulant medication, as finger-prick sampling may carry additional risk

Drug and supplement interactions to be aware of:

  • Immunosuppressants (e.g. methotrexate, ciclosporin) may reduce IgG antibody levels
  • Long-term corticosteroid use may similarly affect immune markers
  • High-dose vitamin supplements are unlikely to interfere but should be noted when interpreting results

 

How Should You Use the YorkTest Food Allergy Test?

 

Using this kit correctly is important for accurate results. Follow each step carefully and read the instruction leaflet included in your kit before you begin. If you are also managing symptoms that affect your gut, our vitamins and supplements range includes products that may support digestive health during an elimination phase.

  1. Register your kit online at the YorkTest website using the unique barcode on your kit.
  2. Wash your hands thoroughly with warm water and dry them completely.
  3. Use the lancet provided to prick the side of your fingertip.
  4. Gently squeeze your finger to encourage blood flow and apply drops to the collection card as directed.
  5. Allow the sample to dry fully before sealing the card in the biohazard bag provided.
  6. Place the sealed bag in the prepaid return envelope and post it promptly — ideally the same day.
  7. Await your digital results, which are typically available within 7–10 days of laboratory receipt.
Indication Age Group Sample Required Frequency
Food intolerance screening Adults 18+ Finger-prick blood sample Once per test kit
Follow-up retesting Adults 18+ Finger-prick blood sample After dietary elimination period (typically 3–6 months)

 

What Are the Possible Side Effects of the YorkTest Food Allergy Test?

 

As a diagnostic test kit rather than a medicine, the YorkTest Food Allergy Test does not carry the same side effect profile as a pharmaceutical product. However, the finger-prick blood collection process can occasionally cause minor physical reactions.

Common side effects (related to finger-prick sampling):

  • Brief, mild pain or stinging at the puncture site
  • Small bruise or redness around the prick site
  • Minor bleeding that resolves quickly with light pressure

Less common side effects:

  • Lightheadedness or faintness in individuals sensitive to blood or needles — sit down before sampling if this applies to you
  • Infection at the puncture site if the area is not kept clean (rare)

If you feel faint during sample collection, stop immediately, sit or lie down, and wait until you feel better before continuing. If the puncture site shows signs of infection — increasing redness, warmth, or discharge — contact your GP.

 

How Should You Store the YorkTest Food Allergy Test?

 

Proper storage ensures the kit components remain effective and your sample is not compromised. If you are also exploring related health products, our skin care collection includes options that may help manage skin symptoms while you investigate potential food triggers.

  • Store the unopened kit at room temperature (15–25°C)
  • Keep away from direct sunlight, heat sources, and moisture
  • Do not refrigerate or freeze the kit components
  • Once the blood sample has been collected and dried, return it promptly — do not leave it for more than 24 hours before posting
  • Keep out of reach of children
  • Do not use the kit after the expiry date printed on the packaging

Written and reviewed by our qualified team

Your safety and success are our highest priorities. Our medical team rigorously evaluates every product and piece of advice we provide, ensuring you receive only the most effective, science-backed solutions available.

Frequently Asked Questions

Where can I buy the YorkTest food allergy test online in the UK?

You can order the YorkTest food allergy test directly from Cured Pharmacy online, with no GP referral required. The kit is dispatched to your home address and includes everything you need to collect and return your sample. It is a convenient option if you want to begin investigating food-related symptoms without waiting for a clinic appointment.

How does the YorkTest food allergy test work in the body?

The test measures IgG antibody levels in your blood in response to specific food and drink antigens. When your immune system has been repeatedly exposed to a food it reacts to, it may produce elevated IgG antibodies — and the ELISA laboratory method used by YorkTest detects and quantifies these. The results indicate which foods showed a raised IgG response, helping you identify potential dietary triggers.

How do I use the YorkTest food allergy test step by step?

Start by registering your kit online using the barcode provided, then wash and warm your hands before using the lancet to collect a finger-prick blood sample. Apply the blood to the collection card, allow it to dry, seal it in the biohazard bag, and return it in the prepaid envelope. Results are typically available digitally within 7–10 days of the laboratory receiving your sample.

What is the difference between a food allergy and food intolerance?

A true food allergy involves an IgE-mediated immune response that can cause rapid, potentially severe reactions including anaphylaxis — this requires specialist management and is not what this test screens for. Food intolerance, by contrast, typically involves delayed symptoms such as bloating, fatigue, or skin irritation, and is associated with IgG antibody reactions. The NHS notes that food intolerance is considerably more common than true food allergy.

Who is eligible to use the YorkTest food allergy test?

The test is suitable for adults aged 18 and over who are experiencing unexplained symptoms they suspect may be linked to food, such as digestive discomfort, skin reactions, or persistent fatigue. It is not recommended for children under 2, pregnant women without GP advice, or those with a known history of anaphylaxis. If you are on immunosuppressant medication, speak to your GP before testing as this may affect your results.

How long does it take to get results from the YorkTest food allergy test?

Once your sample is received by the YorkTest laboratory, results are typically available within 7–10 working days. You will receive an email notification when your digital results report is ready to view. Posting your sample promptly after collection — ideally the same day — helps avoid any delay caused by sample degradation.

What foods does the YorkTest food allergy test screen for?

The YorkTest panel screens for IgG reactions to over 200 foods and drinks, covering common categories including dairy, gluten-containing grains, eggs, nuts, fruits, vegetables, meats, fish, and various additives. The breadth of the panel is one of its key advantages over targeted NHS testing, which typically focuses only on suspected allergens. Your results report will categorise each food by reaction level.

Is the YorkTest food allergy test scientifically validated?

YorkTest uses ELISA methodology, which is a well-established laboratory technique for measuring antibody levels. However, it is important to note that the clinical significance of IgG food testing remains a subject of debate within the medical community — some professional bodies, including allergy specialists, caution that elevated IgG may simply reflect normal dietary exposure rather than intolerance. Results should always be interpreted alongside advice from a registered dietitian.

What are the alternatives to the YorkTest food allergy test?

NHS GP-referred testing includes IgE skin prick tests and specific IgE blood tests, which are used to diagnose true food allergies rather than intolerances. Other at-home food sensitivity tests are available from different brands, though the number of foods tested and laboratory accreditation can vary. If you are managing related digestive symptoms, you may also find our IBS and cramps collection helpful alongside dietary investigation.

Can I use the YorkTest food allergy test if I am pregnant?

The test is not specifically contraindicated in pregnancy, but it is advisable to speak to your GP or midwife before proceeding. Immune function changes during pregnancy, which may influence IgG antibody levels and affect the interpretation of results. Your healthcare team can advise whether testing is appropriate at this time and help you manage any dietary changes safely.

What should I do after receiving my food allergy test results?

Once you receive your results, it is strongly recommended that you work with a registered dietitian to interpret them and plan any dietary changes. Eliminating multiple foods without professional guidance can lead to nutritional deficiencies. YorkTest also offers a nutritional therapist consultation as part of some packages, which can help you structure an elimination and reintroduction plan safely.

How long should I wait before retesting with the YorkTest food allergy test?

If you have completed a structured elimination diet and wish to reassess your IgG reactions, most practitioners recommend waiting at least 3–6 months before retesting. This allows sufficient time for dietary changes to influence antibody levels. Retesting too soon may not reflect meaningful changes in your immune response to foods.

Does the YorkTest food allergy test require a doctor's prescription?

No, the YorkTest food allergy test is available without a prescription and can be ordered directly from Cured Pharmacy. It is a consumer diagnostic kit, not a prescription medicine. However, if your results suggest significant food reactions, it is always a good idea to discuss findings with your GP or a registered dietitian before making major dietary changes.

Can the YorkTest food allergy test diagnose coeliac disease?

No — this test cannot diagnose coeliac disease. Coeliac disease is an autoimmune condition diagnosed via specific blood tests (tTG-IgA antibodies) and confirmed by intestinal biopsy, which must be arranged through your GP. If you suspect coeliac disease, do not start a gluten-free diet before testing, as this can affect the accuracy of NHS diagnostic tests. Speak to your GP for appropriate referral.

What are the latest research findings on IgG food intolerance testing?

Research into IgG food testing continues to evolve. Some studies suggest that IgG-guided elimination diets may help reduce symptoms in conditions such as irritable bowel syndrome, though major allergy societies including the British Society for Allergy and Clinical Immunology have historically been cautious about recommending IgG testing as a diagnostic tool. The evidence base is growing but not yet conclusive, and professional dietary guidance remains essential when acting on results. You can also explore our allergy and hay fever collection for related support products.

How Should You Use the YorkTest Food Allergy Test?

Using this kit correctly is essential for reliable results. Read the full instruction leaflet included in your kit before you begin, and make sure you have registered your kit online before collecting your sample — unregistered samples cannot be processed by the laboratory.

What Is the Correct Dose of the YorkTest Food Allergy Test?

This is a single-use diagnostic test kit, not a medicine with a dosage schedule. Each kit is designed for one test per person. The table below outlines how the test applies across different use scenarios.

When Is the Best Time to Use the YorkTest Food Allergy Test?

There is no specific time of day required for sample collection, but morning is often recommended as blood flow tends to be more consistent after a period of rest. Avoid collecting your sample immediately after vigorous exercise, as this can temporarily affect circulation and make finger-prick sampling more difficult. Ensure your hands are warm before you begin — cold hands reduce blood flow to the fingertips and can make it harder to obtain an adequate sample.

It is also advisable to continue eating your normal diet in the weeks leading up to testing. Avoiding certain foods before the test may suppress IgG antibody levels for those foods, potentially leading to a false-negative result. Do not start an elimination diet before collecting your sample.

How Long Can You Use the YorkTest Food Allergy Test For?

Each kit is a single-use product. Once you have collected and returned your sample, the kit is complete. If you wish to retest — for example, after completing a structured elimination and reintroduction diet — you will need to purchase a new kit. Most practitioners recommend waiting at least 3–6 months between tests to allow dietary changes to meaningfully influence IgG antibody levels. Retesting too soon is unlikely to show significant differences in your results.

If your symptoms persist or worsen despite dietary changes based on your results, consult your GP. This test is a supportive tool, not a substitute for medical investigation.

Do not exceed the recommended dose. If in doubt, speak to your pharmacist.

What Are the Most Common Side Effects of the YorkTest Food Allergy Test?

Because this is a diagnostic test kit rather than a medicine, the side effects associated with it relate primarily to the finger-prick blood collection process rather than any active pharmaceutical ingredient. Most people find the process straightforward and experience only minor, short-lived discomfort.

  • Brief, mild stinging or pain at the fingertip puncture site
  • A small drop of blood that may take a moment to stop — apply light pressure with a clean tissue
  • Minor redness around the prick site that resolves within minutes
  • Small bruise at the puncture site, which typically fades within a day or two

What Are the Less Common Side Effects of the YorkTest Food Allergy Test?

A small number of people may experience less common reactions, particularly those who are sensitive to blood or needles. These are not dangerous but are worth being aware of before you begin sample collection.

  • Lightheadedness or feeling faint — sit or lie down before collecting your sample if you know you are prone to this
  • Nausea associated with needle or blood anxiety
  • Difficulty obtaining enough blood from the fingertip, requiring a second lancet (an additional lancet is usually included in the kit)

What Are the Serious Side Effects of the YorkTest Food Allergy Test?

Serious side effects from a finger-prick test are rare but not impossible. Infection at the puncture site is the most significant risk, though it is uncommon when the lancet is used correctly and the area is kept clean. Signs of infection include increasing redness, warmth, swelling, or discharge from the puncture site in the days following sample collection. If you notice any of these signs, contact your GP promptly. Do not attempt to lance the site again or apply any topical treatments without professional advice.

What Should You Do If You Experience Side Effects?

For minor discomfort or bruising at the puncture site, apply gentle pressure with a clean tissue and keep the area clean and dry. If you feel faint during sample collection, stop immediately, sit or lie down, and wait until you feel fully recovered before continuing. Do not attempt to collect your sample alone if you have a history of fainting associated with blood or needles — ask someone to be present. If you develop signs of infection at the puncture site, seek advice from your GP or pharmacist.

Can the YorkTest Food Allergy Test Interact With Other Medicines?

This test does not involve ingesting any substance, so traditional drug interactions do not apply. However, certain medications can affect the IgG antibody levels measured by the test, which may influence the accuracy of your results. Immunosuppressant medicines — such as methotrexate, ciclosporin, or long-term corticosteroids — can suppress IgG antibody production, potentially leading to lower-than-expected readings. If you are taking any of these medicines, discuss this with your GP or pharmacist before proceeding with the test, as your results may need to be interpreted with this in mind.

If you are concerned about any side effects, contact your pharmacist or GP immediately.

Patient Information Leaflet

Important - Before taking any medication, it is always important to read the Patient Information Leaflet (PIL)

Written and reviewed by our qualified team

GPhC Number: 2233073
Tarun Kumar

Reviewed by:

Tarun Kumar

Superintendent/ Clinical Lead

📖 Find out more about our team of medical content authors and how we ensure the accuracy of our content with our content guidelines.

Content last updated: 31 Mar 2025

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