What’s PKU?

PKU is a rare genetic disorder that affects 1 in 15,000 people. It is caused by a lack of the enzyme phenylalanine hydroxylase, which converts phenylalanine into tyrosine. Newborns are tested for PKU as a special diet low in phenylalanine is required to prevent irreversible mental retardation. PKU foods are available, but can be expensive. […]

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