Normalizing Diet in Individuals with Phenylketonuria Treated with Pegvaliase: A Case Series and Patient Perspective

Abstract

Phenylketonuria (PKU) is one of the most common inherited metabolic disorders, and historically has required affected individuals to follow a severely protein-restricted diet with medical food for life. A novel enzyme substitution therapy, pegvaliase, allows many adults with PKU on therapy to have a reduction in blood phenylalanine (Phe) while on an unrestricted diet. However, there is limited information on optimal nutrition management of individuals with PKU on pegvaliase therapy. This manuscript summarizes a virtual European meeting focused on nutrition management of individuals on pegvaliase therapy, including three case studies and a patient perspective that together provide clinical insights into the real-world management of individuals with PKU on pegvaliase.