Joanna,a child born with the genetic condition PKU,may suffer mental retardation unless

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PKU is a genetic disorder where the body is unable to break down phenylalanine, an amino acid found in many proteins. If left untreated, phenylalanine levels can build up in the body and cause brain damage and mental retardation. The best way to manage PKU is to restrict the intake of phenylalanine through a carefully controlled diet low in protein. This is the only treatment proven to prevent the development of neurological and cognitive symptoms. Gene therapy and drug therapy are not yet effective treatments for PKU. Restricting ribonucleic acid in the diet is not a treatment for PKU.

Joanna,a Child Born with the Genetic Condition PKU,may Suffer Mental