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Food identification by barcode scanning in the Netherlands: a quality assessment of labelled food product databases underlying popular nutrition applications



Food identification by barcode scanning in the Netherlands: a quality assessment of labelled food product databases underlying popular nutrition applications



Public Health Nutrition 22(7): 1215-1222



The quality of labelled food product databases underlying popular diet applications (apps) with barcode scanners was investigated. Product identification rates for the scanned products and the availability and accuracy of nutrient values were calculated. One hundred food products were selected from the two largest supermarket chains in the Netherlands. Using the barcode scanners of the selected apps, the products were scanned and the results recorded as food diary entries. The collected data were exported. Seven diet apps with barcode scanner and food recording feature were selected from the Google Play and Apple app stores. Energy values were available for 99 % of the scanned products, of which on average 79 % deviated not more than 5 % from the true value. MyFitnessPal provided values for sixteen nutrients, while Virtuagym Food and Yazio provided values for only four nutrients. MyFitnessPal also showed the largest percentage of correctly identified products (i.e. 96 %) and SparkPeople the smallest (i.e. 5 %). The accuracy of the provided nutrient values varied greatly between apps and nutrients. While energy was the most consistently and accurately reported value, the availability and accuracy of other values varied greatly between apps. Whereas popular diet apps with barcode scanners might be valuable tools for dietary assessments on the product and energy level, they appear less suitable for assessments on the nutrient level. The presence of user-generated database entries implies that the availability of food products might vary depending on the size and diversity of an app's user base.

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Accession: 065157971

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PMID: 29962361

DOI: 10.1017/s136898001800157x


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