Food insecurity refers to the lack of reliable access to an adequate supply of affordable, nutritious food. This can be caused by various factors such as poverty, lack of access to grocery stores or farmers markets, limited knowledge about nutrition, and other social and economic barriers. Food insecurity is a major public health issue that can lead to malnutrition, chronic diseases, and other health problems. Researchers in this area study the causes and consequences of food insecurity, as well as potential interventions to improve food access and nutrition for individuals and communities.