| Popis: |
The aim of this study was to determinate qualitative and quantitative BCAA (branched-chain amino acids) content in different BCAA dietary supplements and compare it with values informed on their respective labels. Objectives: 1. To identify all three branched-chain amino acids in different BCAA dietary supplements. 2. To determine quantitative content of each amino acid in dietary supplements and compare them with their respective labels. 3. To quantify total BCAA content in dietary supplements and evaluate the compliance with their labels. 4. To discuss study results comparing them with other researchers examinations. Method: gas chromatography – mass spectrometry. Object: seven BCAA dietary supplements produced by different manufacturers. Results and conclusions: during this study, all BCAA in all dietary supplements samples were qualitatively and quantitatively identified. Leucine amount in all samples was insufficient, it varied between 55-78% of declared concentrations (p < 0,05). Isoleucine and valine amounts were sufficient in all dietary supplements (>100%). After comparison of total BCAA content in supplements with their respective labels, it was observed that 4 out of 7 dietary supplements had sufficient BCAA concentration. However, there was no difference in the BCAA content between supplements produced by Europe and USA manufacturers (p > 0,05). In comparison of whey protein and BCAA dietary supplements, both had similar profiles, meaning that 1 out of 2 dietary supplements have sufficient amount of active ingredients, according to their labels. |
