What is the test method?

Our food intolerance tests are done using a blood based method covering IgG 1,2,3,4, the blood sample collection process is done via a pin prick to the finger, it takes around 4-5 large droplets.

Why do food cause an IgGantibodies response?

Generally, foods are broken down during digestion into their component parts e.g. amino acids, glycerides etc. These pass harmlessly through the gut as the gut becomes inflamed (bloated) these proteins enter the bloodstream. This is where they are recognized by the immune system as being ‘foreign’. The immune system responds by making IgG antibodies to these foods.

What is the difference between hair and blood based test?

You can't test immune reactions via a hair sample, and in many cases there have been discrepancies in results when parts of the hair have been coloured/bleached. This has led to inconsistency in the sample tested twice. Our IgG 1,2,3,4 blood based testing covers the full range of antibodies responses, this is important, if a particular food elevates any antibodies against it, this means your gut and immune system recognises that food as a threat. This could affect the nutrients absorbed from this particular food and leads to multiple symptoms.

Do high IgG antibody levels cause symptoms?

When a food causes the body to produce high levels of IgG then these antibodies combine with the protein in the food to form an ‘antigen-antibody complex’. These complexes are usually eliminated by other cells in the immune system. However, if the immune system is overloaded, these insoluble molecules become deposited in tissues within the body, causing chronic inflammation and the subsequent production of symptoms.

Why test for IgG antibodies to foods?

The efficacy of a diet based on the measurement of IgG antibodies specific for food components has been demonstrated in a number of conditions, both in independent studies and clinical practice. Excellent results have been obtained in patients with migraine, IBS and obesity.

What is the lower age limit for testing?

Supply Life's existing policy for a lower age limit on testing for IgG food antibodies is that we do not recommend testing on children under the age of 2 years. We base this on the European Society for Paediatric Gastroenterology, Hepatology, and Nutrition Guidelines for the Diagnosis of Coeliac Disease 2012, which states that there is a possibility of false negative results occurring in infants younger than 2 years of age. This related to the fact that the infant gut is more permeable than that of an adult coupled with immature mucosal immunity that is still in the learning and development stage. We have used this criterion as antibody measurements in Coeliac Disease are comparable to food IgG measurements used in our food intolerance tests. However, we are aware that there are in fact no published guidelines that specifically indicate a minimum age for testing for such IgG antibodies, for example the guidelines for testing for coeliac antibodies indicate that such testing can be performed any time after the introduction of gluten into the diet. Therefore, where such requests are received from a statutory regulated professional the decision of when and what tests to perform will remain the responsibility of the requesting clinician.

What should be considered before testing - Is there any medication that I should avoid when taking a food intolerance test, due to its potential effects upon the results?

Customers should avoid the use of immunosuppressant medication if possible if performing these tests, as they may have an impact upon the results. Please refer to the medication datasheet in the “Support” section for further details.

How does the test work?

Food extracts are 'printed' onto nitrocellulose 'pads'™ on a glass microscope slide, together with calibration standards and controls. A blood sample provided by the patient is diluted and dispensed onto each printed microarray. Food IgG antibodies, if present, bind to the food extracts and the results are measured by a high-resolution scanner, before being calibrated against the standards using the reporting software to give quantitative results. This software then produces a tailor-made printout of the final food IgG antibody result for each food on the requested food panel.

Do you need to full the microvette all the way to the white line?

Although it is advisable to completely fill the tube, a half filled microvette tube should be enough to run the test. If there are any problems with a sample and the lab will let the customer know. However, if you are ordering two tests we can test from one sample if you provide a full microvette.

Do you need to store the blood in the fridge, if not sending the same day?

Yes, it does need to be stored in the fridge with the lid secured if not sending on the same day.

Can I upgrade my test to a larger food panel?

You can upgrade for up to a maximum of 4 weeks from the date that your first sample is received.

What are the sample requirements and test turnaround?

A pin-prick blood sample is required. Results are available within 10 working days.

Does the Supply Life test for all subclasses of IgG antibody or only IgG4?

Our process screens for all IgG subclasses 1-4, with the numbers on the test report representing the total IgG concentration for each food extract in the selected panel.

Your Comprehensive Guide to Gut Health: Understanding, Nurturing, and Testing

September 27, 2023

Your gut is more than just a digestion centre; it's a crucial component of your overall health and well-being. Gut health refers to the balance of microorganisms living in your digestive tract, and it plays a significant role in digestion, immune function, and even mental health. In this guide, we'll explore what gut health is, how to improve it, and how taking a home food intolerance test can empower you to make informed dietary choices.

Understanding Gut Health

What is Gut Health?

Your gut is home to trillions of microorganisms, including bacteria, fungi, and viruses, collectively known as the gut microbiome. A healthy gut microbiome is characterised by a diverse and balanced community of these microorganisms.

The Gut-Body Connection

Your gut health influences various aspects of your health, including digestion, metabolism, immune function, and even your mood. An unhealthy gut can lead to digestive issues, allergies, autoimmune diseases, and more.

Improving Your Gut Health

Dietary Choices

Eat a balanced, fibre-rich diet with plenty of fruits, vegetables, whole grains, and lean proteins. Fermented foods like yoghurt, kefir, sauerkraut, and kimchi can introduce beneficial probiotics into your gut.

Lifestyle Factors

Prioritise regular exercise and manage stress, as these can positively impact gut health. Get enough sleep, as poor sleep can disrupt the gut microbiome.

Probiotics and Prebiotics

Consider taking probiotic supplements to introduce beneficial bacteria into your gut. Consume prebiotic foods like garlic, onions, and bananas to nourish your gut microbiome.

The Role of Food Intolerance Testing

Understanding Food Intolerance

Food intolerance occurs when your body has difficulty digesting certain foods, leading to discomfort and symptoms like bloating, gas, and diarrhoea. Common intolerances include lactose, gluten, and fructose.

Home food intolerance tests, like those offered by reputable companies, provide a convenient and non-invasive way to identify potential intolerances. Testing can help you pinpoint specific foods that may be causing gut issues, allowing for more targeted dietary adjustments.

With us at Supply Life, home food intolerance tests require a blood sample. Results are analysed, and a personalised report is provided, indicating which foods may be problematic for you. The results will show the foods your body does and does not respond well to, allowing you to alter your diet and encourage enhanced gut health.

Conclusion

Taking care of your gut health is a vital step toward overall well-being. By understanding what gut health is, making informed dietary and lifestyle choices, and utilising home food intolerance testing, you can embark on a journey to improve your gut health, alleviate discomfort, and promote a happier, healthier you.

Back to blog