Adherence
Providing nutrition information (labels, food guides) is necessary but insufficient to change consumer food choices because knowledge does not override competing preferences for taste, convenience, and price.
Knowing what is healthy is not enough to make you buy it. Your brain prioritizes taste, price, and convenience over nutrition labels. To actually eat healthier, do not rely on reading complex labels. Instead, use simplified visual cues (like star ratings), set defaults (like choosing water as the default beverage), and make healthy options the easiest and most visible choice in your environment.
Also, knowledge, while necessary, may not be sufficient to motivate behavior change. Even when consumers understand nutrition information, competing preferences for tastier, less expensive, or more convenient foods may lead them to make other choices.
Why this rating
The paper is a review of policy and behavioral economics literature, citing multiple studies but noting a lack of causal longitudinal data.
Source
Nudging Consumers toward Better Food Choices: Policy Approaches to Changing Food Consumption Behaviors
Joanne F. Guthrie et al. · Psychology and Marketing · 2015
DOI 10.1002/mar.20795
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