There are 20 essential amino acids in the body. Phenylalanine is one of these. These essential amino acids need to be supplied from external sources such as food. They are termed “essential” as they are needed for the body to function properly and grow normally.
Phenylketonuria (PKU) is a rare newborn genetic disease that impacts between 1 in 10,000 to 1 in 20,000 people, depending on the individuals' genetic ancestry. PKU causes an amino acid-;called phenylalanine (Phe)-;to build up in the bloodstream.
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