Phenylketonuria is an inherited long term condition where, from birth, the person is unable to break down an amino acid called phenylalanine, a component of proteins found in many common foods. If undiagnosed or untreated, the condition can disrupt normal brain development and lead to severe learning difficulties. There is no cure for PKU, but early diagnosis and a strict dietary regime allow both normal brain development and a full life span. In this collection, 18 year old Clair and 17 year old Jack share their knowledge and experience of living with PKU.