I have twin girls that are 21/2 months and have hyper-PKU. There level have aleays been low (7.6 and 8.5) with the special formula mixed w/ regular formula the levels went down to 2.2. This is so hard for me to understand seeing that my older daughter is fine. Are my girls ever going to be able to eat normal food because their levels are so low. If you are a mother with twin girls that are having the same issues please help.