My daughter is cpku and she got her blood level from the nutrionist and it was 3.8. I was so excited to hear that. She will be starting tyrosine supplements as soon as they are delivered. She has also started pre-natal vitamins and her first dr. appt is Sept. 1. I can't wait to hear what he will say! I'm sure we will rely mainly on the nutrisionist who is keeping in contact with her now. Will let you know what happens next.