ABSTRACT With concerns about food systems growing due to environmental change and the abrupt disruption of trade relations following the dual crises of the pandemic and the war in Ukraine, it has become increasingly common for global development agendas to include discussions, programmes, initiatives, and policy proscriptions about the risks of malnutrition. Yet, there remains limited insight into how securitising nutrition in particular influences the politics of food insecurity more broadly. Therefore, we aim to develop a critical perspective of ‘nutritional crisis’. In doing so, we draw from critical security studies to advance an interpretation of the nutritional turn that takes into account three key dynamics: (1) the performativity of nutritional crisis discourses (2) the political-economic context in which they are embedded (3) alternative notions of nutrition, security, and crisis among resistance movements. We apply this perspective to a case in point concerning food insecurity in Guatemala – a country that remains the intense focus of nutritional policies at the global level and simultaneously a site of struggle and resistance for local and transnational food justice.