ousehold food insecurity, defined as insecure or inade quate access to food because of financial constraints, is increasingly recognized as a serious public health problem in many affluent nations. 1-4 The latest national estimate for Canada indicates that 12.6% of households experienced food insecurity in 2012, 5 but important geographic variations exist within the country, with heightened vulnerability in the North. 5-7 Since national moni toring began, Nunavut has consistently had the highest rates of food insecurity, 5,6,8 with the rate reaching 46.8% in 2014. 8 Food insecurity is strongly associated with poor nutrition 9-13 and adverse mental and physical health outcomes across the life cycle. 14-22 Recent research also indicates that food insecurity is a robust and independ ent predictor of increased health care use 23 and expenditures. 24,25 Food insecurity represents an experience of material depriva tion strongly influenced by the economic resources of house holds, 26-30 but high food prices are also considered an important driver of food insecurity in Canada's North. 7,31-34 In April 2011, the Government of Canada replaced the longstanding Food Mail Program with Nutrition North Canada, a marketdriven food retail subsidy intended to make perishable, nutritious foods more affordable and accessible in northern communities that do not have yearround rail, road or marine access. 34-36 Similar to the Food Mail Program, Nutrition North Canada serves communities that are predominantly inhabited by Indigen ous Peoples and have high rates of food insecurity, low educa tional attainment, low income, underemployment and unem ployment. 34,37,38 Whereas the Food Mail Program consisted of an air freight transportation subsidy transferred to Canada Post for the delivery of numerous perishable foods, nonperishable foods and essential nonfood items, 35,37,39 Nutrition North Canada is a retail subsidy focused primarily on perishable, nutritious foods and transferred directly to southern suppliers and northern retailers, who are expected to pass on the full subsidy to con sumers at the point of purchase 35,40