Pediatric Pearls #2. Phenylketonuria (PKU): OK to Breastfeed? Yes!

November 19, 2024

The first condition ever screened as a newborn metabolic screen was phenylketonuria (PKU). This is why some colleagues may refer to the newborn screen as the PKU test.

History

Early on in this story, scientists linked excessive phenylalanine in the urine of some children with significant developmental delay. The test, the ferric chloride test, was conduct…