Hereditary haemochromatosis (HH) is a very common genetic disorder in Australia, affecting approximately 1 in 200 people of European origin. It can lead to iron overload and though frequently asymptomatic, especially early in the disease course, it can lead to a wide range of symptoms, organ failure and death if untreated. GP registrars need to develop an approach to the patient with possible iron overload, including understanding the role for genetic testing.