Nudging and Boosting towards Sustainable Food Choices – A Systematic Literature Review of Cognitively Oriented Measures

Reducing food-related greenhouse gas emissions is one of the major tasks in the future, as food causes one-third of global emissions. Influencing customers’ purchasing decisions towards low-carbon food is thus decisive. Nudging has been proven to be an adequate mechanism to influence people towards sustainable food choices. Another relatively new approach is boosting, which promotes people’s education, inducing autonomous decision-making. In the context of sustainable food, research on nudging and boosting is still at the beginning. Therefore, this chapter conducts a systematic literature review to identify, classify and assess the potential of cognitively oriented nudges and boosts towards sustainable food choices. The sample consists of 217 English-speaking papers published between 2011 and 2021. After three filtering steps, 21 scientific journal publications remained in the data extraction form. All articles are field experiments, comprising descriptive labelling, evaluative labelling, and visibility enhancements. The analysis shows that menu restructurings (e.g. placing a vegetarian option on the top of the menu) in restaurants are the most effective intervention to reshape customers’ demands. Evaluative labels (e.g. traffic-light labels on the menu or product packaging) are the second most effective measure. They help people understand eco-related information and thus make better decisions. The effect of descriptive labels seemed small, as they provide no meaningful frame assisting people in processing the data. In conclusion, the research recommends applying cognitively oriented nudges and boosts to promote sustainable food choices and deduces practical implications for appropriate implementation and marketing