【文章摘要】Rising sugar-sweetened beverage (SSB) consumption among children and adolescents precipitates a global  metabolic health crisis, yet the efficacy of information interventions in emerging economies remains underexplored. Here we report results from a large-scale field experiment (N = 5,427) in central China designed to test  two information interventions: “short-term boosts” (video-based health literacy) and “long-term boosts” (the  former plus persistent visual displays of sugar equivalents). We show that both interventions significantly  reduced SSB consumption, with “long-term boosts” outperforming “short-term boosts” (− 28.3 ml day⁻ 1 vs. –23.6  ml day⁻ 1 ), resulting in reductions in total sugar intake of 3.1 g day⁻ 1 and 2.2 g day⁻ 1 , respectively, and that these  effects were stronger in school than at home. Mechanism analysis reveals that these effects were driven primarily  by substitution toward sugar‑free beverages. Notably, heterogeneity analysis reveals that high pocket money and  baseline preference for SSBs rendered “short-term boosts” ineffective. By contrast, “long-term boosts” remained  robust against these constraints and generated amplified reduction effects for overweight children and adolescents. However, dynamic analysis shows that the efficacy of both interventions waned over the week, culminating in a compensatory rebound in consumption on day 7. These findings demonstrate that while single schoolbased information interventions can reduce SSB consumption within a limited timeframe, their effects are not  sustainable; to counteract the observed decay, effective policy must evolve from isolated school-based prompts to  sustained, periodic reinforcement mechanisms that bridge the school-home divide.

【关键词】Information intervention, Sugar-sweetened beverages, Children and adolescents, Boosts, Self-nudging.

【文章作者】宣智翀，李欣荣，赵启然，樊胜根

【作者单位】中国农业大学

【发表期刊】Food Policy

【基金资助】本文得到国家自然科学基金（项目编号：72573168、72061147002）及中国农业大学"2115人才培育计划"的资助的资助的资助。

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