Arkham, I am not saying that Wikipedia does not say that, but anybody can add information to Wikipedia. I have even written about PKU on the site due to inaccuracies. High levels of protein in the urine indicate PKU needs to be tested for but it is not a conclusive source. PHE does not exit the body of a person with PKU in the noraml fashion. If in the urine it indicates an excessive of protein in the body, such as that of too much Vitamin C.