ArticleCanadian journal of public health = Revue canadienne de sante publique2026
A controlled before-after quasi-experimental study examining the impacts of a supermarket on-shelf nutrition labelling intervention on food sales by type of food processing.
Article in Canadian journal of public health = Revue canadienne de sante publique, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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8 authors.
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Abstract
objectivesTo examine (1) the alignment of an on-shelf nutrition labelling system with classifications of food processing; and (2) the impact of the system on food sales by type of food processing.
methodsTransaction data from three supermarket banners of a major Canadian supermarket chain were examined before and after the Guiding Stars® system, an on-shelf nutrition labelling system, was implemented in control and intervention supermarkets (n≈1.88 billion products sold). Descriptive analyses examined alignment between Guiding Stars® and the NOVA categorization for type of food processing for 61,456 food and beverage products available for purchase, and percentage of products sold by type of processing. Changes in selling 100 units of products across processing type overall and within 11 food categories were evaluated.
resultsThe Guiding Stars® and NOVA systems were moderately consistent in categorizing products by healthiness. The majority of products sold (53.7%) were ultra-processed foods (UPF). Small but significant positive shifts were observed in the intervention sites with increased purchases of un/minimally processed products in three categories and processed products in three categories relative to the change in UPF. Negative shifts were observed with increased purchases of UPF relative to changes in un/minimally processed products in one category and processed products in two categories.
conclusionsOn-shelf nutrition labelling systems may affect small shifts in food sales with an overall shift away from UPF, but with differential impact across food categories. Incorporating food processing into nutrient profiling systems for on-shelf labelling may result in greater reductions in UPF purchasing.
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