Food is a fundamental necessity for sustaining human life, making providing adequate food for everyone a basic human right. Therefore, meeting the food needs of the entire population at any given time becomes a primary objective of a country's food policy. Food availability is a key component of food security. In the past, food insecurity was often attributed to a lack of food supply. However, recent research has shown that food self-sufficiency does not automatically guarantee food security. Despite advancements in agriculture and the economy, approximately 735 million people globally suffer from acute malnutrition. Food waste, with one-third of food wasted annually, significantly affect food security. This study investigates the impact of food waste, national income and food prices on food security using panel data from the World Bank, FAO, Economist Impact, and United Nations. Data from 100 countries for year 2002 to 2021 will be estimated using pooled OLS, fixed and random effect regressions. Stata software will be used for data analysis. The Hausman test will determine the most suitable model, and diagnostic tests will address potential issues such as multicollinearity, heteroskedasticity, and endogeneity. The findings will inform sustainable food policies and contribute to achieving the UN Sustainable Development Goals, emphasising the importance of food security through efficient resource management.