Biology what does pku result in?? Asked by bookragstutor 13 years ago 8/20/2012 9:52 AM Last updated by anonymous 12 years ago 12/17/2012 12:32 AM
PKU is phenylalanine which can build up to harmful levels in infants that are breastfeeding. If the infant can't matabolize the breast milk it can affect infant brain development. Certain ethnicities seem to suffer from this more than others.