Background: Only few data on dietary management of adult phenylketonuria (PKU) patients are published.
Objectives: This study aimed to assess living situation, dietary practices, and health conditions of early-treated adult PKU patients.
Methods: A total of 183 early-treated PKU patients ≥18 years from 8 German metabolic centers received access to an online survey, containing 91 questions on sociodemographic data, dietary habits, and health conditions.