Inclusion Criteria:  Willingness to take part in the study. Signed informed consent. Diagnosis of CD confirmed by biopsy and/or serology. Ability to: provide urine and stool samples, perform the home tests, and register results.  Exclusion Criteria:  Not precise diagnostic of CD. Comorbid condition that in the opinion of the investigator would interfere with the study. Lack of willingness to take part in the study. Inability to use the test or provide samples. Frequent voluntary GFD transgressions. To provide less than 70% of the required samples.