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The main distinction lies in the body’s response. Food allergies involve a reaction from the immune system, often immediate, mediated by immunoglobulin E (IgE), and can lead to severe symptoms. Food intolerances, on the other hand, do not involve the immune system and are usually due to enzyme deficiencies or sensitivity to certain food components, causing more subtle and delayed symptoms.
What is the difference between an intolerance and an allergy?
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Intolerance tests aim to identify the elements likely to cause adverse reactions. Some tests measure the levels of immunoglobulin G (IgG) specific to various foods in the blood, assuming that a high concentration of IgG indicates a sensitivity.
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Other methods include hydrogen breath tests, used to diagnose specific intolerances such as lactose or fructose intolerance. These tests measure the amount of hydrogen in the exhaled air after ingestion of the suspected food; an increase in hydrogen indicates poor absorption.
How does an intolerance test work?
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In addition to food intolerances, the intolerance test can also detect intolerances to various environmental and chemical elements such as:
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Household and industrial chemicals
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Food additives and preservatives
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Textile materials such as certain fabrics or dyes
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Environmental substances such as pollen, dust, mold
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Cosmetic and personal hygiene products
Detecting these elements helps to better understand potential sources of non-specific reactions such as skin irritations, respiratory issues, or unexplained general symptoms.
What non-food elements can be detected by the intolerance test?
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The procedure varies depending on the type of test. For blood tests measuring IgG, a blood sample is taken, usually via a finger prick, and then analyzed in a laboratory. It is recommended to regularly consume the foods to be tested in the weeks preceding the sample collection to ensure antibody detection.
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Breath tests require a fasting period, followed by ingestion of the suspected food. Exhaled air is then analyzed at regular intervals to detect a rise in hydrogen, indicating poor digestion.
Finally, some tests use hair samples: in this case, a few hairs are taken from the root and then analyzed in a laboratory to identify substances potentially responsible for intolerances. This type of sample collection is simple, quick, and non-invasive.
What is the procedure for carrying out an intolerance test?
The interpretation of results depends on the type of test performed. For IgG tests, elevated antibody levels against certain foods may suggest a sensitivity. It is essential to consult a healthcare professional for proper interpretation and to avoid unnecessary dietary restrictions.
Breath test results are more straightforward: a significant increase in hydrogen after ingestion of the suspected food indicates a probable intolerance. However, these tests are specific to certain intolerances, such as lactose intolerance.
For hair sample tests, the results typically indicate a list of food and non-food substances to which you may be sensitive. Interpretation involves taking into account the substances identified as problematic and assessing, with a healthcare professional, whether it is necessary to eliminate them temporarily in order to observe any improvement in symptoms.
How to Interpret the Results of an Intolerance Test?
Yes, the most reliable approach remains the elimination-reintroduction diet. This involves removing suspected foods from the diet for several weeks, then reintroducing them one at a time while observing the body’s reactions. This method, although longer, allows for personalized identification of intolerances at a lower cost.
How to Order an Intolerance Test?
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Select your test
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Order online
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Receive the sampling kit
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Collect the sample
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Return the sample
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Receive the results
The results of intolerance tests are generally available within 7 to 14 business days after your sample is received by the laboratory. You will be notified by email as soon as your results are ready to be viewed.
Are There Alternatives to Intolerance Testing?
Food DNA Test
Discover how your genetic heritage influences your metabolism and nutritional needs. Our food DNA test helps you adapt your diet to your genes in order to optimize your well-being.
Celiac Disease Test
Do you suspect gluten sensitivity? Our specific celiac disease test allows you to quickly identify a genetic predisposition to this condition so you can adjust your diet accordingly.
What Do Intolerance Test Results Include?
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The results you will receive contain a list of foods to which your body shows potential sensitivity. They generally include:
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A classification of foods according to their level of intolerance (mild, moderate, or severe).
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Personalized recommendations to adjust your diet while avoiding nutritional deficiencies.
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Practical advice for managing your intolerances on a daily basis.
It is strongly recommended to consult a healthcare professional or a nutritionist after receiving the results for personalized guidance.
The intolerance test can be taken by most healthy adults. However, it is not recommended for children under 2 years old, pregnant or breastfeeding women without prior medical advice, or individuals with immune disorders or serious medical conditions without medical supervision.