Funding Information: CINTESIS-UIDB/04255/2020 and UIDP/04255/2020, a program financially supported by Fundação para a Ciência e Tecnologia/Ministério da Ciência, Tecnologia e Ensino Superior, through national funds is acknowledged. Publisher Copyright: © 2023 by the authors.; In PKU, the protein requirements are contentious. In 2018, we evaluated the protein intake in patients with PKU. Ninety-nine early treate...