Protein and Amino Acid Profiles of Different Whey Protein Supplements

Journal of Dietary Supplements
Cristine C AlmeidaCarlos A Conte-Junior

Abstract

Whey protein (WP) supplements have received increasing attention by consumers due to the high nutritional value of the proteins and amino acids they provide. However, some WP supplements may not contain the disclosed amounts of the ingredients listed on the label, compromising the nutritional quality and the effectiveness of these supplements. The aim of this study was to evaluate and compare the contents of total protein (TP), α-lactalbumin (α-LA), β-lactoglobulin (β-LG), free essential amino acids (free EAA), and free branched-chain amino acids (free BCAA), amongst different WP supplements produced by U.S. and Brazilian companies. Twenty commercial brands of WP supplements were selected, ten manufactured in U.S. (WP-USA) and ten in Brazil (WP-BRA). The TP was analyzed using the Kjeldahl method, while α-LA, β-LG, free EAA, and free BCAA were analyzed using HPLC system. There were higher (p < 0.05) concentrations of TP, α-LA, β-LG, and free BCAA in WP-USA supplements, as compared to the WP-BRA supplements; however, there was no difference (p > 0.05) in the content of free EAA between WP-USA and WP-BRA. Amongst the 20 brands evaluated, four WP-USA and seven WP-BRA had lower (p < 0.05) values of TP than those specified on the lab...Continue Reading

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Citations

Nov 16, 2016·The Journal of Dairy Research·Marion P CostaCarlos A Conte-Junior
Oct 7, 2020·The American Journal of Clinical Nutrition·Juliane CalvezClaire Gaudichon
Jun 3, 2021·Foods·Rose Saxton, Owen M McDougal
Oct 31, 2021·Journal of Food Biochemistry·Shruti DhasmanaShivani Shrivastava

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