Cardiovascular disease and malignancies account for more than 70% of all causes of mortality and morbidity in Italy. There is a subtle balance between genetic determinants and lifestyle, that often defines the line between health and sickness. So far studies aiming at identifying risk factors have mainly come from Northern Europe and the USA. It was to understand this balance between genetics and environmental determinants better, and to tailor appropriate preventive strategies for Italian and other Southern European populations, that the Moli-sani study was launched, transforming a small Italian region into a large scientific laboratory: the "Molise lab".