Food & Drink Intolerance Test

Allergy involves IgE‑mediated immune responses and can be life-threatening; intolerance is dose‑dependent, digestive and generally non‑life-threatening and may involve other immune pathways.

Allergy (IgE) Blood Test Yes, certain medications can affect the results of an IgE allergy test. For example, antihistamines, steroids, or immune-suppressing drugs may interfere with your body’s natural allergic response and impact accuracy. If you are taking medication, always consult with your healthcare provider before completing the test. They can advise whether you should pause medication and, if so, for how long. Intolerance (IgG) Blood Test Medications generally do not affect IgG intolerance testing. However, if you are on long-term immunosuppressive therapy or steroid treatment, your antibody levels may be reduced, which could influence results. For the most accurate outcome, we recommend discussing your medications with your healthcare provider before testing. Bioresonance Sensitivity Test (Hair Sample) Medications do not impact bioresonance testing in the same way as blood tests. Because bioresonance analyses the energetic frequency of a hair sample, medications present in the body at the time of collection should not alter the reading. That said, results should always be viewed as a guideline to support your wellness journey, not a medical diagnosis.

An Intolerance (IgG) test is designed for people who want to understand whether certain foods or drinks may be contributing to unwanted symptoms. It can be especially useful if you: • Experience ongoing issues such as bloating, fatigue, headaches, skin problems, or digestive discomfort without a clear cause. • Suspect that certain foods might be affecting your energy, weight management, mood, or overall well-being. • Have tried adjusting your diet but haven’t been able to pinpoint which foods may be triggering your symptoms. • Want personalised insights to support dietary changes and healthier eating habits. The test measures IgG antibodies — part of the body’s immune response — to identify potential food intolerances. Unlike food allergies, which involve IgE antibodies and can cause immediate, sometimes severe reactions, food intolerances often lead to delayed symptoms that are harder to connect to specific foods. It’s important to note that IgG testing should not be used to diagnose food allergies or medical conditions. If you suspect a serious allergy or have significant health concerns, always seek the advice of your doctor or other qualified health provider if you have a medical condition or with any questions you may have regarding a medical condition and/or medical symptoms.

Testing for IgG antibodies to foods can provide valuable insights into how your body may be reacting to the things you eat and drink on a regular basis. Unlike food allergies, which trigger an immediate immune response through IgE antibodies, food intolerances are often linked to IgG antibodies and can cause delayed symptoms that are harder to trace back to specific foods. Common reasons to test for IgG antibodies include: • Unexplained symptoms such as bloating, fatigue, headaches, joint pain, skin problems, or digestive discomfort. • Identifying hidden triggers - reactions may appear hours or days after eating, making it difficult to spot patterns without testing. • Personalised diet guidance - IgG testing helps highlight potential foods contributing to inflammation or discomfort, supporting more informed dietary changes. • Improved well-being - many people report higher energy, clearer skin, and better weight management after adjusting their diet based on IgG test results. It’s important to note that IgG testing is not used to diagnose food allergies or medical conditions. Instead, it can be a helpful tool for creating a tailored nutrition plan and supporting your overall wellness journey.

Yes, it's possible to have elevated IgG levels to certain foods and still feel perfectly fine. In some cases, the immune system is highly effective at clearing IgG-antigen complexes before they trigger any noticeable symptoms. This means that while the body is reacting to a food at the immune level, it may not lead to inflammation or discomfort - at least not immediately or consistently.That’s why IgG results are best interpreted alongside your personal health history, symptoms, and in consultation with a qualified practitioner.

IgG stands for Immunoglobulin G - one of the main types of antibodies produced by your immune system. Antibodies like IgG play a key role in your body’s defence system, helping to identify and neutralise foreign substances such as bacteria, viruses, or even certain food components. There are several types of immunoglobulins, including IgA, IgE, IgG, and IgM, each with its own function. IgG is particularly important in identifying delayed immune responses, which are often linked to food intolerances rather than immediate allergic reactions.

During normal digestion, food is broken down into smaller components like amino acids and fatty acids, which are safely absorbed into the bloodstream. However, if the gut lining becomes more permeable than usual — a condition sometimes referred to as "leaky gut" — larger fragments of undigested or partially digested food can enter the bloodstream.When this happens, the immune system may mistakenly identify these food particles as potential threats and produce IgG antibodies in response. This can lead to inflammation and a range of symptoms linked to food intolerances.

Your blood test results include your reactivity ratings to the items analysed in your chosen test. Our test results are comprehensive but simple to follow and explain in full what everything means to make sure you fully understand it.

You don’t need any medical knowledge or training to read our test results, as everything is laid out to make them quick and easy to understand.

No. This test measures IgG antibodies. Allergy assessment may involve a clinical history and targeted tests for specific IgE antibodies. An IgG result cannot confirm or rule out a food allergy. If you suspect an allergy, speak with a qualified healthcare professional.

You’ll receive a digital report showing your measured IgG result for each of the 89 foods and drinks. The report presents results from Class 0 to Class 4. These classes describe the measured IgG response; they do not classify foods as “safe”, “unsafe” or proven causes of symptoms.

Your purchase includes a free 30-minute one-to-one consultation with a certified Nutritionist. You can use it to discuss what your report shows, ask questions and talk through sensible next steps.

The 89-food IgG test costs £99.99 as part of our Affordable Health range. An instalment payment option is available at checkout; the available provider and payment terms will be shown before you place your order.

Results are typically delivered within 3 working days after your sample reaches the lab. Delivery of your kit and the return journey of your sample take additional time. All orders placed before 2pm on weekdays are despatched sameday using a Royal Mail Tracked48 service and every collection kit includes a postage paid Royal Mail Tracked24 return shipping label directly to our laboratory.