This study examined reactions to the UK government's Better Health campaign through a thematic analysis of tweets. Four themes were generated: Embracing Better Health; There is no Better Health without mental health; Inconsistent messaging; Only a surface-level solution. Findings suggest the campaign is problematic, given its lack of consideration for mental health and wider societal factors that contribute to obesity. The campaign could exacerbate mental health difficulties for individuals with eating disorders due to its focus on weight and perceived fat-shaming approach. Recommendations are made to develop future campaigns that avoid negative public responses, minimise harms, and maximise intended benefits.