Nutrition literacy is an academic concept and research field that examines the capacity of individuals to access, understand, appraise, and utilize nutrition-related information to make informed decisions about diet and health. This field investigates the prevalence and determinants of this capacity across populations, its multi-dimensional nature encompassing functional, interactive, and critical skills, and its crucial impact on dietary behaviors, health outcomes, and the effectiveness of nutrition education and communication strategies. Its significance lies in identifying barriers to informed dietary choices and informing public health interventions aimed at improving population health.