Quantificação de teores de proteínas totais em suplementos de whey protein concentrado

• Published in: Revista brasileira de nutrição esportiva 2023-07, Vol.17 (104), p.365-373
• Main Authors: Marinelli, Sergio, Machado, Flavia Farinazzi, Oliveira, Rafael Augusto, Santos, Eduardo Vinícius Barboza dos
• Format: Article
• Language: Portuguese
• Subjects: Actuación; Carenze nutrizionali; Deficiencias nutricionales; Deficiências nutricionais; Desempenho; Etichettatura; Etiquetado; Labeling; Legislación; legislation; Legislazione; Legislação; Nutritional deficiencies; Prestazione; Rotulagem
• ISSN: 1981-9927; 1981-9927

Food supplements are products that help consumers adapt to their diet, given their varied nutritional composition. Several supplements have been widely prescribed by professionals aiming at physical appearance, performance and also prevention of nutritional deficiencies and recovery of individuals in risk groups. The aim of this study was to quantify the total protein content of Whey Protein samples available on the market, comparing them with values ​​declared by manufacturers and with Brazilian legislation. The total protein contents of thirty samples of food supplements with Whey Protein Concentrate (WPC), acquired through online commerce, were analyzed by the indirect Kjedahl method. All analyzes were carried out in triplicate. The results showed that 66.67% of them had lower protein values ​​compared to the descriptions on their respective labels. However, considering the 20% plus and minus fluctuation that is allowed by RDC nº18/2003, only 13.34% of these samples are in non-conformity, according to Brazilian legislation, although they do not represent the real values ​​reported on the labels of products, which are made available to consumers. Whey Protein is one of the most consumed food supplements today, whether by athletes to improve physical performance, or to recover nutritional status in individuals with various disorders, the description on the package is the main source of nutritional information about the product. In this way, the regulation of the real values ​​of the composition of supplements is essential to meet the nutritional needs of different consumers who purchase them for different purposes. Gli integratori alimentari sono prodotti che tendono ad aiutare i consumatori ad adattarsi alla loro dieta, data la loro varia composizione nutrizionale. Diversi integratori sono stati ampiamente prescritti da professionisti che mirano all'aspetto fisico, alle prestazioni e persino alla prevenzione delle carenze nutrizionali e al recupero di individui nei gruppi a rischio. L'obiettivo di questo studio era quantificare il contenuto proteico totale dei campioni di proteine ​​del siero di latte disponibili sul mercato, confrontandoli con i valori dichiarati dai produttori e con la legislazione brasiliana. Il contenuto proteico totale di trenta campioni di integratori alimentari con Whey Protein Concentrate (WPC), acquistati online, è stato analizzato utilizzando il metodo Kjedahl indiretto. Le analisi sono state condotte in triplice copia. I risul