Professor Bu Yeap is an endocrinologist based at Fremantle Hospital, Western Australia, and in the School of Medicine and Pharmacology of the University of Western Australia. He is involved in research, clinical service, supervision of junior staff and endocrine advanced trainees, and teaching. He has a major research interest in the influence of testosterone on health during male ageing. He has over 90 peer reviewed publications and has been awarded over $6 million in research funding. He has been an international invited speaker on the topic of hormones and health outcomes in ageing men, and he received the US Endocrine Society’s International Award for Publishing Excellence in 2013. Prof Yeap is the second named Chief Investigator on the NHMRC grant funding T4DM, an Australia-wide multicentre randomised placebo-controlled trial of testosterone to prevent diabetes in overweight men with impaired glucose tolerance.