To pick out eligible research, titles, abstracts, and major texts had been reviewed based mostly on the eligibility standards. The bibliographic references of the eligible articles had been additionally reviewed to determine further articles missed out by the database search technique. Information extraction was carried out utilizing an extraction spreadsheet, consisting of the next variables: publication 12 months, language, nation of research, research design, pattern dimension, setting (real-world setting that utilises the gross sales information earlier than and after the implementation of the particular labelling intervention in shops, or managed laboratory settings based mostly on a digital meals setting), race, imply age or age vary, proportion of feminine, training, earnings, occupation, socioeconomics, investigated meals varieties, variety of meals varieties (single or a number of), intervention situation, management situation, entry to NFt for each intervention and management teams, time stress, end result, measure of end result, and impact estimate.
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