HAVE about thirty years old. Some are graduates in law, architecture, or letters, because they had a cognitive development normal. Are the generation of the years ’90 of the patients suffering from phenylketonuria (Pku), a rare genetic disorder that prevents sufferers to metabolize phenylalanine, an essential amino acid present in all proteins. A generation to keep an eye on because they are the first that – thanks to newborn screening – were able to lead a life very similar to that of their peers.