Nutrition security is a condition in which individuals and populations have consistent and equitable access to foods that support healthy diets, meet nutritional requirements, and promote health and well-being. It encompasses not only the availability, affordability, and accessibility of food, but also dietary quality, nutrient adequacy, dietary diversity, and food safety. Nutrition security is closely related to food security but places greater emphasis on whether food access and consumption support optimal nutritional status and health outcomes ^[1][2]. Its achievement also depends on factors beyond the food supply, including healthcare, sanitation, hygiene, and appropriate caregiving and feeding practices, which influence nutrient utilization and nutritional status ^[2][3]. Nutrition security applies to individuals and populations across the life course and encompasses the prevention of undernutrition, micronutrient deficiencies, and diet-related overweight and obesity. It is a multidimensional concept, and no single universally accepted measure currently captures all its dimensions ^[1].