Obesity prevalence is on the rise globally. Often, national policies to address this issue are lacking or have limited effect. Public health advocates are therefore campaigning for regulatory...Show moreObesity prevalence is on the rise globally. Often, national policies to address this issue are lacking or have limited effect. Public health advocates are therefore campaigning for regulatory measures in the form of a tax on sugar-sweetened beverages (SSBs). In the UK, advocates achieved this goal, whereas in Australia, they did not. In this study, the question was asked whether the framing strategies used by public health advocates mattered in their effectiveness. The aim of the study was to increase understanding about the causal mechanisms behind framing. Through content analysis, this study showed that effective framing enabled advocates to guide the public and political debate about obesity and the SSB-tax. Dominating the debate, however, did not in itself result in policy change. Contextual factors matter in this regard. Show less