 Type 2 diabetes T2D is a common disease associated with multiple complications and an increased risk of cardiovascular morbidity and mortality. Also, it is a heavy economical burden on society. 1st degree relatives of patients with T2D have an increased risk of developing T2D. This risk can be modified by the ingested diet: a traditional north European diet rich in saturated fat increases the risk, while a Mediterranean diet rich in monounsaturated fat protects from development of T2D and cardiovascular disease. 