A compositional analysis of Commercially Available Sports Drinks and Powders with particular reference to Osmolality and Sugar Content
Mitchell, Nicola Jayne
Cardiff Metropolitan University
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The purpose of this study was to investigate the composition of eight commercially available sports drinks and powders, in relation to their use in those who are untrained or non-exercisers. The products selected to be analysed comprised of four of the bestselling drinks from a leading supermarket and four powder products from well-known websites, as they were not available in most supermarkets. In order to determine the composition of each drink, they were tested in an Osmometer and a Refractometer to calculate the osmolality and concentration of carbohydrate (sugar) present. A label analysis revealed the levels of electrolytes and salt present in each drink. The results obtained from this study show there is no significant difference (p<.0.05) in the sugar or salt concentrations between all of the products investigated. Furthermore the osmolality of five of the products which claimed to be Isotonic had no significance difference (p<0.05) when compared to normal blood Osmolality, whereas the three products that were bearing any claims regarding osmolality showed a significant difference (p>0.05) when compared with normal blood osmolality. Therefore, the conclusions drawn from this study demonstrate that the current composition of sports drinks is not suitable for use by the non-exercising public and overuse of these products can lead to serious health issues. It therefore recommends such products should not be used unless the individual is partaking in extensive and vagarious exercise on a regular basis.
BSc (Hons) Sports Biomedicine and Nutrition
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