Article dans une revue: Since Oct 31, 2017, a front-of-pack labelling system named Nutri-Score (a synthetic information system based on colours and letters from green/A to red/E), allowing consumers to see and compare at a glance the nutritional value of pre-packaged foods is being implemented, on a voluntary basis, in France.1 Although some experts warned that the Nutri-Score might constitute an obstacle to EU trade,2 the measure appeared justified on public health grounds. The adoption of the Nutri-Score label was made after a lengthy 4 year process, during which intense lobbying by agro-industry opposed scientific evidence.