This essay examines food security as a critical social determinant of health, focusing on its impact on individuals and Canadian society. It defines food security and highlights vulnerable groups such as children, older adults, and Aboriginal Canadians, detailing how food insecurity affects their health outcomes and overall well-being. The paper explores the broader consequences of food insecurity on the Canadian population, including links to chronic diseases, mental health issues, and strains on the healthcare system. It also discusses current issues and trends related to food security, such as the triple burden of malnutrition, climate change, and the impact of conflicts and natural disasters. Finally, the essay identifies various groups involved in addressing food security challenges, including public service agencies, non-profit organizations, advocacy groups, and food distribution networks. The paper references several studies and reports to support its arguments and provide a comprehensive overview of food security in Canada.