Nutrition food defense is an interdisciplinary research field investigating the intricate relationship between dietary intake and the functionality of an organism's defense mechanisms, encompassing the study of how specific nutrients, food components, or dietary patterns influence biological defenses against various threats. This concept examines the molecular, cellular, and physiological pathways by which nutritional status and dietary composition modulate immune responses, enhance cellular resilience, and contribute to overall physiological robustness against pathogens, environmental toxins, and other stressors. Its significance lies in informing strategies for disease prevention, optimizing health and immunity, and enhancing resilience through dietary interventions.