Point-of-sale sugar-sweetened beverage warning posters <i>v</i> . control posters were associated with reductions in school store sugar-sweetened beverage purchases made by Guatemalan adolescents

Our results suggest that messages that warn adolescents about the high-sugar content in SSB may be an effective, low-cost way to modestly reduce purchases of these drinks. These findings provide evidence to support national front-of-package labelling, currently being considered in Guatemala.