The field of nutritional epidemiology and public health aims at elucidating the relationships between dietary intake, nutritional status and health outcomes. We train future epidemiologists in observational and intervention studies, with the aim of finding novel ways to preventing disease and promoting health. This will be based on studying the aetiology of diet related diseases (from a biomedical perspective), the strategies for prevention in the community setting (from a behavioural and environmental perspective) and treatment in the curative setting (from a clinical perspective). In this way, epidemiology strengthens the understanding of maintaining good health and disease aetiology, and helps quantify the impact of public health interventions on individual and environmental outcomes.