Data available in the public domain

For our document analysis, we followed the protocol of INFORMAS (International Network for Food and Obesity/non-communicable diseases Research, Monitoring and Action Support) for collecting CPA information [26]. These methods are described in details elsewhere and consist of an analysis of publicly available data [26]. Given our time constraints and based on the results of a pilot study on the CPA of the food industry in Latin America [9], in addition to an initial analysis of the websites of Nestlé and PF Alimentos in Chile (random selection of industry actors amongst our sample), we decided to restrict our searches to data published during the period 1st January - 31st December 2019. Some information nevertheless referred to events or activities that took place before 1st January (e.g.; a Twitter post from January 2019 that referred, retrospectively, to an event from December 2018).

As recommended by INFORMAS, we collected information on the most prominent food industry actors in Chile. Given that we had no access to the market shares of these actors, inclusion was decided based on discussion with local experts. Our final sample included the twelve members of the International Food and Beverage Alliance (IFBA): Coca-Cola, Danone, Ferrero/AgriChile, General Mills, Grupo Bimbo/Ideal, Kellogg’s, Mars, McDonald’s, Mondelez, Nestlé, PepsiCo, Unilever). This coalition represents the largest food manufacturers, globally, in terms of market shares. We also included three Chilean food manufacturers (Carozzi Alimentos; PF Alimentos; Soprole); one association in food science and technology (the Asociación Chilena de Ciencia y Tecnología en Alimentos (Sochital, the Chilean Association of Food Science and Technology); one research institute funded by the food industry (The International Life Science Institute - ILSI Sur-Andino); and three trade associations (Chile Alimentos; the Asociación Gremial De Alimentos Y Bebidas De Chile A.G. - AB Chile (Guild Association of Food and Drinks of Chile); the Supermercados de Chile A. G (‘Supermarkets of Chile’).

For each of these actors, when available, we consulted their national website(s) and Twitter account(s). As recommended by INFORMAS, in addition to the industry’s webpages, we collected information from universities with a curriculum in nutrition, from nutrition professional associations, and the Chilean Congress, Ministries and other sources from the government. These sources and websites are listed in Additional file 2. All data collected from the public domain is available as an Additional file 3 (data is in Spanish). Danone, General Mills, Grupo Bimbo/Ideal, Mars, and Mondelez had no national websites or Twitter accounts. The website of Sochital was not working during the period of data collection.