Can the mental retardation and other problems associated with phenylketonuria be treated or prevented?

Question

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Phenylketonuria (PKU) is a genetic disorder that requires early and lifelong dietary intervention. By following a special low-phenylalanine diet during infancy and childhood, the mental retardation and other problems associated with PKU can be prevented. However, if left untreated, PKU can lead to irreversible brain damage and intellectual disability.

Can the Mental Retardation and Other Problems Associated with Phenylketonuria