Richard Skolnik, lecturer at Yale for the Essentials of Global Health course, covers nutrition as a cross-cutting theme in global health. The session addresses how undernutrition and micronutrient deficiencies affect mortality and development, particularly among women, children, and adolescents, and connects nutrition to broader global health challenges like complex humanitarian emergencies and environmental factors. Skolnik lays out key indicators used to measure nutritional status and discusses the burden of malnutrition in low and middle income countries alongside emerging concerns about obesity and diet-related disease. The lecture is part of a module that also covers immunization and disaster response, but this session stays focused on nutrition's role in shaping population health outcomes. Delivered in a straightforward classroom lecture style aimed at students new to the field of global health.