Type of disease: Rare conditions
Phenylketonuria (PKU) is an inherited condition that is caused by toxic levels of phenylalanine in the body. If left untreated, this buildup of phenylalanine can cause severe intellectual disabilities. Because PKU can be detected by a simple blood test and is treatable, newborn screening is available for this disorder. Source: Genetic and Rare Diseases Information Center (GARD), supported by ORDR-NCATS and NHGRI.