What is PKU? In a snapshot The detailed science How do you test for PKU? How did I get PKU? What does living with PKU mean? What are the PKU treatments? Dietary PKU therapy PKU: A quick snapshot Phenylketonuria or PKU for short is a rare and serious genetic condition that affects the cognitive development of 1 in 10,000 babies born in the UK. PKU affects the body's protein metabolism in such a way that the individual cannot break down a type of amino acid called pheny