Food Intolerance, unlike Food Allergy, does not involve an immune response. Food intolerance can occur only due to the lack of an enzyme necessary for the digestion of a component/part of a food. Most reactions are dose-dependent and their evolution is gradual and of low reactivity.
The detailed clinical history of the individual is the best tool to obtain the diagnosis, although there are some complementary tests, such as:
- Breathing Test
- levels of hydrogen and/or methane, which result from the fermentation of microorganisms when there is malabsorption, are measured;
- this test is scientifically valid.
- Specific IgG or IgG4:
- is done through blood collection;
- in this case, the dosage of these immunoglobulins is done;
- This test is not only expensive, but can lead to false positives.
- Electrodermal testing:
- is the measurement of electromagnetic frequency changes when the body reacts to a certain stimulus;
- are not recognized by many health care organizations worldwide.