Osteoporosis is characterised by low bone mineral density, increased bone fragility and an increase in fracture risk. Approximately 43 per cent of women and 13 per cent of men in Australia aged over 70 are osteoporotic, with numbers set to rise significantly as the population ages. It is estimated that a fragility fracture increases the risk of premature death by 50 per cent. Despite its high prevalence and the availability of effective pharmacological interventions, underdiagnosis and undertreatment of osteoporosis remains common. GP registrars are likely to have had very limited prior experience in managing this condition, and supervisors can facilitate learning in relation to effective case finding, risk factor modification, assessment and treatment.