The Eating Well With Canada’s Food Guide (CFG), which represents Canada’s official dietary guidelines, is designed to address high rates of obesity and diet-related chronic disease in Canada. This article presents a qualitative study of the social and ideological actions that the CFG performs. The study draws on the concepts of antecedent genres and uptake from rhetorical genre studies, applying them in a multimodal analysis of the CFG and interviews with the CFG’s producers and registered dietitians (RDs) who work with vulnerable populations. Findings reveal that scientific representations play a profound role in the social and ideological actions that the CFG performs. The author demonstrates how representations of scientific evidence from nutrition science, as exemplified in the concept of the Food Guide Serving, are taken up by the CFG and, in turn, how these scientific representations influence RDs’ use of the CFG and dominate, rather than facilitate, discussions about healthy eating. The study suggests that the CFG, instead of being an enabling resource, is a limiting document: It limits who can make healthier food choices and how such choices can be made.

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加拿大饮食健康指南 (CFG) 代表加拿大的官方饮食指南，旨在解决加拿大肥胖率高和与饮食相关的慢性病的问题。本文对 CFG 执行的社会和意识形态行动进行了定性研究。该研究借鉴了修辞体裁研究中的先行体裁和吸收的概念，将它们应用于 CFG 的多模态分析以及与 CFG 的生产者和与弱势群体一起工作的注册营养师 (RD) 的访谈。调查结果表明，科学表征在 CFG 执行的社会和意识形态行动中发挥着深远的作用。作者展示了来自营养科学的科学证据的表述，如食品指南服务的概念所例证，被 CFG 采纳，并且，反过来，这些科学表述如何影响 RD 对 CFG 的使用，并主导而不是促进有关健康饮食的讨论。该研究表明，CFG 不是一种有利资源，而是一种限制性文件：它限制了谁可以做出更健康的食物选择以及如何做出这些选择。