Policies to restrict unhealthy food and beverage price promotions have been recommended, as part of a broader strategy to reduce obesity, but little evidence underpins such recommendations. We aimed to synthesize the literature on the prevalence of healthy and unhealthy food and beverage price promotions and their potential influence on purchasing behaviour. Eight scientific databases (covering health, business, and marketing) and grey literature were systematically searched using search terms related to “food and beverage price promotions” up until July 2019. Articles were included if they examined prevalence of, and/or consumer response to, food and non‐alcoholic beverage price promotions, from a nutritional perspective. Of the 16 included studies, eight examined the prevalence of price promotions and eight examined the potential influence of price promotions on purchasing behaviour. Seven of the “prevalence” studies found that price promotions were more common for unhealthy foods and beverages. Seven “influence” studies found a greater proportion of price‐promoted purchases were for unhealthy compared with healthy products. Policies that reduce the prevalence and/or influence of price promotions on unhealthy foods and beverages may shift consumer purchasing away from unhealthy foods and beverages. Empirical studies are required to better understand how consumers and industry may respond to such policies.

中文翻译：

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健康和不健康食品和饮料价格促销的盛行及其对购物者购买行为的潜在影响：对文献的系统评价。

作为减少肥胖的更广泛战略的一部分，已经建议采取限制不健康食品和饮料价格上涨的政策，但是很少有证据支持这种建议。我们旨在综合有关健康和不健康食品和饮料价格促销的流行及其对购买行为的潜在影响的文献。截止到2019年7月，使用与“食品和饮料价格促销”相关的搜索词，系统搜索了八个科学数据库（覆盖健康，商业和营销）和灰色文献。从营养的角度来看，食品和非酒精饮料的价格促销。在16项纳入研究中，八位研究了价格促销的普遍性，八位研究了价格促销对购买行为的潜在影响。七项“患病率”研究发现，不健康食品和饮料价格上涨更为普遍。七项“影响力”研究发现，与健康产品相比，价格促销产品中不健康的购买比例更高。降低价格促销对不健康食品和饮料的普遍性和/或影响的政策可能会使消费者的购买远离不健康食品和饮料。需要进行实证研究，以更好地了解消费者和行业如何对此类政策做出反应。七项“影响力”研究发现，与健康产品相比，价格促销产品中不健康的购买比例更高。降低价格促销对不健康食品和饮料的普遍性和/或影响的政策可能会使消费者的购买远离不健康食品和饮料。需要进行实证研究，以更好地了解消费者和行业如何对此类政策做出反应。七项“影响力”研究发现，与健康产品相比，价格促销产品中不健康的购买比例更高。降低价格促销对不健康食品和饮料的普遍性和/或影响的政策可能会使消费者的购买远离不健康食品和饮料。需要进行实证研究，以更好地了解消费者和行业如何对此类政策做出反应。