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Effect of Phenylalanine-Restricted Diet in Phenylketonuria II

F. A. HORNER, M.D.; C. W. STREAMER, M.D.; D. E. CLADER, M. A.; L. L. HASSELL, M.A.; E. L. BINKLEY Jr., M.D.; K. W. DUMARS Jr., M.D.
AMA Am J Dis Child. 1957;93(6):615-618. doi:10.1001/archpedi.1957.02060040617003.
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In an earlier paper two of us (F. A. H. and C. W. S.) presented the short-term psychological and behavioral changes observed in two preschool phenylketonuric children treated with a phenylalanine-restricted diet.1 In addition, a newborn sibling of one of the cases, who had received dietary treatment since 8 weeks of age, was reported as developing normally through the first 9 months of life. The present paper offers an additional year of follow-up on these three patients. It also reports on the changes observed in a second newborn and two 18-month-old children under long-term therapy.

Dietary Program  The phenylalanine-restricted diet used in this series is that outlined by Armstrong and Tyler.2,3 Patients are given a phenylalanine-free diet consisting of a protein hydrolysate basal mix* (4.2 gm/kg/day), fat in the form of a vegetable oil (3.0 gm/kg/day) and CHO (10 gm/kg/day) for three weeks. On such a diet

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