Myth 4: It is possible to diagnose gluten sensitivity through a saliva, blood or stool test
None of these tests have been validated, therefore they are not accepted by the scientific community. So far, there are also no indicators or biomarkers that allow identifying when a product fulfills the requirements of a gluten-free diet or prevents harm for those with gluten sensitivity. Gluten sensitivity can only be diagnosed by excluding each type of food that harms each individual, although after trying certain foods, it is easier to find out gluten sensitivity.
There are, however, tests that can indicate celiac disease. These tests are necessary to determine if someone suffers from celiac disease and can easily lead to dietary restrictions and important changes in lifestyle in order to prevent further damage due to gluten consumption.