Background & Aims: Sustainable diets are characterized by being culturally acceptable, economically fair, affordable and accessible to all, nutritionally sufficient, safe and healthy, and are efficient in their utilization of human and other natural resources. The aim of the present study was to determine the difference in the cost and affordability of providing nutritious and sustainable food baskets in different zones of Iran 2016 through 2019.
Material & Methods: In this repeated cross-sectional study, the expenditure and income data of 128,716 Iranian households that participated in the "Household Income and Expenditure Survey" 2016 through 2019 were used.