Review: Amino acid concentration of high protein food products and an overview of the current methods used to determine protein quality
2018
Huang, Shiqi | Wang, Lydia M. | Sivendiran, Thakshi | Bohrer, Benjamin M.
Quality of the dietary protein in foods rather than amount of dietary protein may be of greater importance from a human health and wellness standpoint. Various systems are in place to determine the value of dietary protein. Protein digestibility-corrected amino acid score (PDCAAS) and digestible indispensable amino acid score (DIAAS) are the two major protein standards used to determine the completeness of proteins by their unique concentration and digestibility of indispensable amino acids. The purpose of this review was to provide a comprehensive comparison of the amino acid concentration of high protein foods and provide the current status of the use and practicality of the PDCAAS and DIAAS system. This review builds upon previous research analyzing the total nutrient density of protein-rich foods and expands scientific research investigating the quality of proteins. In summary, the average sum of indispensable amino acids for meat and fish products is much more consistent than that of non-meat and plant-based food products. However, some non-meat products have relatively similar amounts of indispensable amino acids on a similar serving size basis. The overwhelming aspect of determining protein quality is that greater research is needed to determine protein digestibility of food products.
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