This report presents a first step of the conceptual framework which will be used in the FoodSecure project to analyse the determinants of food and nutrition security. It draws on previous research and insights to develop a broad conceptual framework. The framework addresses drivers and determinants of food and nutrition security at multiple levels of aggregation. At the individual and household level, we make a distinction between drivers that affect the food and nutrition status, and drivers that affect the stability of this status. As gender is relevant in all dimensions of food and nutrition security at this level, we discuss it as a cross-cutting determinant. At the national and international level, food prices play a major role in food and nutrition security. We therefore discuss the drivers of food supply and demand, both in the short and long run. Finally, the framework describes the channels through which both micro- and macro-level policies are related to food and nutrition security.