Food and nutrition security (FNS) is achieved when adequate food is available and is accessible to individuals in terms of quantity, quality, safety, and socio-cultural acceptability. At the same time, individuals should consume it to live a healthy and happy life. Food security is a broad concept that includes availability, accessibility, utilization and stability of food. The stability of these elements varies in their nature, causes and effects at the macro, meso and micro levels. FNS is associated with a number of overlapping concerns that hinder the development of individuals and societies. Prominent among these issues are gender, livelihoods and poverty, in addition to conflicts, crises and natural disasters. This book elucidates the concepts and innovative models with respect to food and nutrition security. Different approaches, evaluations, methodologies, and advanced studies on FNS have been included herein. The book is appropriate for students seeking detailed information in this area of study.