The only current treatment for phenylketonuria (PKU) is a diet that ____.

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The only current treatment for phenylketonuria (PKU) is a diet that supplies tyrosine and restricts phenylalanine. This is because individuals with PKU cannot properly metabolize phenylalanine, which can cause a buildup of harmful byproducts in the body. However, tyrosine is necessary for various functions in the body and cannot be synthesized by individuals with PKU, so it must be included in the diet. Thus, the diet restricts phenylalanine and supplies tyrosine.

The Only Current Treatment for Phenylketonuria (PKU) Is a Diet