The Lancet Digital Health review identifies three critical failures in current obesity prevention strategies. First, existing digital tools remain narrowly weight-focused rather than nutrition-focused, missing the opportunity to build sustainable health behaviours. Second, most interventions ignore both structural barriers—built environment design, food system inequities, socioeconomic factors—and the voices of adolescents themselves in tool design.
Third, prevention frameworks overlook that individual willpower is insufficient when commercial determinants actively work against healthy choices. Effective solutions require integrated approaches combining food systems reform, regulatory action, and digital tools co-designed with young people.
The message is clear: apps alone cannot solve adolescent obesity without addressing the systems and policies that shape food environments and health inequity.
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