Four years after its official launch in France, Nutri-Score—a five-color logo that reflects the overall nutritional quality of foods—is now firmly established on store shelves. Studies conducted to date have focused on adults, and none have assessed the potential effectiveness of Nutri-Score among adolescents. Yet adolescents are both consumers and shoppers, and they are likely to strongly influence their parents’ purchasing decisions. Furthermore, young people are often the target of marketing for products whose consumption should be limited. Santé publique France therefore conducted a survey in October 2021 among 1,201 adolescents aged 11 to 17 living in mainland France. This summary presents the results of this survey, as well as some findings from a July 2021 survey of adults on key indicators such as awareness or reported use of the logo. Key points: In October 2021, 97% of the adolescents surveyed reported having already seen or heard of Nutri-Score. This level of awareness is comparable to that measured among adults in July 2021, which stood at 95%. Teenagers clearly understand the meaning of the logo: two-thirds spontaneously indicated that Nutri-Score provides information on the product’s composition and nutritional quality. Perception of Nutri-Score among teenagers is very positive, with 96% stating that the logo is easy to spot on packaging and 91% finding it easy to understand. When it comes to assessing a product’s nutritional quality, adolescents primarily rely on the product’s nutritional information (spontaneously cited by 15%) and the use of an assessment tool (cited by 13%), particularly the Nutri-Score (cited by 12%). Across the entire population, 7 out of 10 adolescents had already purchased a product with the Nutri-Score by October 2021. For more than half of the adolescents who had already purchased a product with the Nutri-Score (54%), the presence of the logo on the packaging encouraged them to buy that product.