Professor Maria Giżewska graduated from and works at the Pomeranian Medical University in Szczecin, Poland. She started at the Department of Biochemistry and in 1987 she joined the Department of Pediatrics, Endocrinology, Diabetology, Metabolic Diseases and Cardiology where she holds a position of Vice-Head. Professor Giżewska has a specialization in general pediatrics and pediatric metabolism and is a consultant on inborn errors of metabolism for the Region of West Pomerania, Poland. Since the mid-nineties, her research has been focused on early diagnosis and treatment of patients with different types of inborn errors of metabolism, including phenylketonuria. She was involved in the development of the first European Guidelines on the Diagnosis and Management of Phenylketonuria which were published in 2017 in The Lancet, Diabetes and Endocrinology and in the Orphanet Journal of Rare Diseases. At the moment, she is coauthoring the second edition of the Guidelines. Professor Giżewska is the author of over 120 publications in both Polish and international journals (Impact Factor 183, Hirsch index 29) on inborn errors of metabolism, general pediatrics, pediatric endocrinology, neurology and genetics. She was trained in Denmark, Italy, Great Britain, Qatar, USA and Japan. Phenylketonuria and other inborn errors of metabolism were the subjects of her lectures given in many European countries, USA and Canada, South America, China, Japan, Australia and in the Middle East. On many