I am a thirty-four year old mom of a beautiful three year old daughter who does not have PKU like I do. When I was pregnant in 2002 the docotrs all agreed that she would be carrier if she was not born with PKU. They also said that there was a seventy-five percent chance that she could have PKU anyway, even if my husband was not a carrier, because I have it. She was born without PKU and eats enough for both of us! We finally get our moneys worth at a buffet! Hope this helps.