NYU School of Medicine, NYU Wagner School of Public Service, New York, New York, USA.
Obesity (Silver Spring). 2011 Oct;19(10):1971-8. doi: 10.1038/oby.2011.214. Epub 2011 Jul 21.
Recently, localities across the United States have passed laws requiring the mandatory labeling of calories in all chain restaurants, including fast food restaurants. This policy is set to be implemented at the federal level. Early studies have found these policies to be at best minimally effective in altering food choice at a population level. This paper uses receipt and survey data collected from consumers outside fast food restaurants in low-income communities in New York City (NYC) (which implemented labeling) and a comparison community (which did not) to examine two fundamental assumptions necessary (though not sufficient) for calorie labeling to be effective: that consumers know how many calories they should be eating throughout the course of a day and that currently customers improperly estimate the number of calories in their fast food order. Then, we examine whether mandatory menu labeling influences either of these assumptions. We find that approximately one-third of consumers properly estimate that the number of calories an adult should consume daily. Few (8% on average) believe adults should be eating over 2,500 calories daily, and approximately one-third believe adults should eat lesser than 1,500 calories daily. Mandatory labeling in NYC did not change these findings. However, labeling did increase the number of low-income consumers who correctly estimated (within 100 calories) the number of calories in their fast food meal, from 15% before labeling in NYC increasing to 24% after labeling. Overall knowledge remains low even with labeling. Additional public policies likely need to be considered to influence obesity on a large scale.
最近,美国各地通过了法律,要求所有连锁餐厅(包括快餐店)强制标注卡路里。这项政策将在联邦层面实施。早期研究发现,这些政策在改变人群的食物选择方面最多只能起到最小的作用。本文利用从纽约市(NYC)低收入社区外的快餐店(已实施标签)和一个比较社区(未实施标签)收集的消费者收据和调查数据,检验了卡路里标签有效所需的两个基本假设(尽管不是充分的):消费者知道他们在一天中应该摄入多少卡路里,以及目前顾客对他们的快餐订单中卡路里的数量估计不当。然后,我们研究了强制菜单标签是否会影响这两个假设中的任何一个。我们发现,大约三分之一的消费者能够正确估计成年人每天应该摄入的卡路里数。很少有(平均 8%)人认为成年人每天应该摄入超过 2500 卡路里,大约三分之一的人认为成年人每天应该摄入少于 1500 卡路里。NYC 的强制标签并没有改变这些发现。然而,标签确实增加了正确估计(在 100 卡路里以内)快餐餐中卡路里数量的低收入消费者的数量,从纽约市标签实施前的 15%增加到标签实施后的 24%。即使有标签,整体知识仍然很低。可能需要考虑其他公共政策来大规模影响肥胖问题。