The metabolic syndrome is characterised by a cluster of metabolic risk factors which may include abdominal obesity, dyslipidaemia, high blood pressure and insulin resistance or glucose intolerance. Patients with this cluster are at increased risk of coronary heart disease, stroke, peripheral vascular disease and type 2 diabetes. The dominant underlying risk factors for the syndrome are abdominal obesity and insulin resistance – so the epidemic of obesity means that we will be seeing a major increase in cases of metabolic syndrome over the next few years. Management requires tight control of all risk factors, with weight loss and prevention of weight gain being important preventive measures.