Phenylketonuria Symptoms
 Symptoms vary from person to person. Because of the rarity of PKU, many symptoms go undiagnosed or unrecognized. In addition, there are variations in the categories of PKU individual's. There are untreated, early treated, those returning to diet, Hyperphe, uncontrolled, and highly controlled. For your average infant a doctor will diagnose PKU with a quick blood test. Their symptom will be high PHE levels.