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Phenylpyruvic Acid – A Clear Indicator Of PKU Disorder

Phenylpyruvic acid, discovered in 1934. by Dr. Ivar Asbjørn Følling, is found in phenylketonuria patients’ urine and is a clear indicator of PKU disorder.

PKU patients lack PAH enzyme and are unable to convert phenylalanine into tyrosine, which enables phenylalanine to acumulate within the body.

Accumulated phenylalanine is then metabolised by various metabolites to phenlypyruvic acid. Few years after Dr. Følling’s discovery, phenylketonuria disorder finally got its’ official name due to phenylpyruvic acid found in patients’ urine samples.

Want to learn more?


“The PKU Paradox: A Short History of a Genetic Disease” by Diane B. Paul and Jeffrey P. Brosco.

“Robert Guthrie–The Pku Story: Crusade Against Mental Retardation” by Jean Holt Koch.

“Low Protein Cookery for Phenylketonuria” by Virginia E. Schuett.

“Low Protein Food List for PKU” by Virginia E. Schuett.

“Low Protein Bread Machine Baking for PKU” by Virginia E. Schuett.

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