Multiomics Approach in Adult Patients With Phenylketonuria

Inclusion Criteria: * PKU patients over the age of 18, * diagnosed through the newborn screening program, * patients who participated in the final visit of the ECOPHEN study, * affiliation with a health insurance plan, * informed consent dated and signed by patients for DNA analysis (saliva sample) Exclusion Criteria: * Patients whose PKU diagnosis was not detected during neonatal screening, * Patients who have not signed a dated informed consent form, * Patients who are unable to provide a saliva sample.