Background
Food systems play a major role in anthropogenic greenhouse gas emissions (GHGE) [In this context, highlighting the need for a global public awareness of the environmental impacts of food products, the French government has set up an interdisciplinary committee to assess the feasibility and efficiency of environmental labelling on food products [A recent systematic review by Potter and colleagues (2021) provided promising evidence regarding the ability of carbon footprint labels or other ecolabels (e.g., organic, sustainable agricultural practices) to promote more environmentally friendly food choices [Another limitation of previous studies is their designs that may have increased participants’ attention to environment labels compared to real-life [The present study was a randomised controlled trial with two experimental arms (with vs. without environmental labelling) conducted in a virtual reality supermarket that included a large and diverse range of food products that could be part of a main meal. We aimed to develop a new traffic-light front-of-pack environmental label with a design based on state-of-the-art evidence [