Metabolic syndrome: introduction The metabolic syndrome (MetS, also known as syndrome X, syndrome of chronic cardiovascular disease and Reaven's syndrome) is a constellation of different conditions, including abdominal obesity, insulin resistance, dyslipidaemia and elevated blood pressure. All components of the MetS (with obesity holding a central role in its development) have been recognized as independent risk factors for cardiovascular disease and so the presence of MetS is associated with other comorbidities such as the prothrombotic state, proinflammatory state, nonalcoholic fatty liver disease and reproductive disorders [Cornier et al. 2008]. Owing to its multiple components, many definitions have