Nutritional epidemiology aims to grasp the interplay between diet and health outcomes in populations, offering important information for public health policy and strategy formulation. Through examination of dietary habits, nutrient consumption, and lifestyle, researchers are able to make connections between nutrition and risk for chronic conditions like diabetes, cardiovascular disease, and obesity. Population-based investigations also assist in assessing the impact of dietary intervention, food fortification programs, as well as public health interventions. This session will feature how evidence is brought from nutritional epidemiology into guidelines, informs the process of developing targeted interventions, and ultimately drives better health outcomes at a population level.