PKU Skin Stripping

Skin sample collection: samples of human stratum corneum will be obtained with squame adhesive tape disks typically at the time of their clinic appointment. The tape will be placed on the inside of the forearm and the procedure will be repeated up to five times per patient to have sufficient corneocytes for analysis. This type of sampling is non-invasive.

Blood specimens: blood will be obtained for serum amino acids/phenylalanine levels. This sample is obtained for disease monitoring as part of routine standard of care. Results from up to three clinic visits will be correlated with the tape sample obtained on the same day.