Print Email Facebook Twitter The Protein Digestibility-Corrected Amino Acid Score (PDCAAS) - A concept for describing protein quality in foods and food ingredients: A critical review Title The Protein Digestibility-Corrected Amino Acid Score (PDCAAS) - A concept for describing protein quality in foods and food ingredients: A critical review Author Schaafsma, G. TNO Kwaliteit van Leven Publication year 2005 Abstract Protein Digestibility-Corrected Amino Score (PDCAAS) is discussed. PDCAAS is now widely used as a routine assay for protein quality evaluation, replacing the more traditional biological methods [e.g., measurement of the Protein Efficiency Ratio (PER) in rats]. PDCAAS is based on comparison of the essential amino acid content of a test protein with that of a reference essential amino acid pattern and a correction for differences in protein digestibility as determined using a rat assay. Although PDCAAS is a rapid and useful method, it often shows discrepancies when compared to PER values. These discrepancies relate to the following issues: uncertainty about the validity of reference patterns, invalidity of correction for fecal (versus ileal) digestibility, truncation of PDCAAS values to 100%, failure to obtain full biological response after supplementation of the limiting essential amino acid, discrepancies between protein and amino acid digestibility, effects of processing on protein quality, and effects of the presence of antinutritional factors in the matrix containing the protein. Part of the discrepancy between PDCAAS and PER can be overcome by modifications of PDCAAS. This article describes some proposed modifications and puts forward the suggestion that the rat protein fecal digestibility assay be replaced by an in vitro ileal amino acid digestibility assay based on a computer-controlled gastrointestinal model. Subject NutritionPhysiological SciencesAbsorptionAmino acidsBioassayFood processingFood productsInformation analysisNutritionSynthesis (chemical)DigestibilityGastrointestinal modelProtein digestibility-corrected amino acid score (PDCAAS)Protein qualityProteinsamino acidessential amino acidproteintrypsinanimalanimal foodbioavailabilitybody weightchemistrychickenfoodfood analysisgastrointestinal tracthumanileummetabolismmethodologynutritionpreschool childratreviewAmino AcidsAmino Acids, EssentialAnimal Nutrition PhysiologyAnimalsBiological AvailabilityBody WeightChickensChild, PreschoolFoodFood AnalysisGastrointestinal TractHumansIleumNutrition PhysiologyProteinsRatsTrypsin To reference this document use: http://resolver.tudelft.nl/uuid:9c76ca83-1eba-4565-8d27-f1917f975f9d TNO identifier 238480 ISSN 1060-3271 Source Journal of AOAC International, 88 (3), 988-994 Document type article Files To receive the publication files, please send an e-mail request to TNO Library.