LAUSR

Economic crises such as the cost-of-living crisis and the COVID-19 pandemic have caused a signi fi cant reduction in people ’ s ‘ real ’ disposable incomes, with poorer households being disproportionately affected (1) . One notable consequence of this is the experience of food insecurity. Food insecurity is de fi ned as not having consistent access to foods that are nutritious in quality and quantity. Indeed, food insecurity is reliably associated with poor diet (2) , likely because of the higher cost of foods required to adhere to government guidelines. There has been a call to support changes in eating habits so that they are healthier and more sustainable for the environment, particularly as the UK food system is not sustainable in its current form (3) . However, it is unknown whether such dietary changes are plausible for those experiencing lower food security given the higher prices of these foods. Using Food and You 2 Wave 4 data (4) , a secondary data analysis was conducted to identify whether there are differences between food security levels on dietary behaviours in favour of health and sustainability. Participants were adults (aged 16+ years) residing in England, Wales, or Northern Ireland (N = 5584). Data were analysed using logistic regressions with high food security as the reference group. Food security was measured using the USDA-10 and participants were categorized into four levels: high, marginal, low, very low. Dietary behaviours were assessed using questions with the choice of dichotomous answers (yes [I do this]/no [I do not do this]). Data were weighted and odds ratios (OR) were adjusted for