Audrey Josephine Cahn (17 October 1905 – 1 April 2008) was an Australian microbiologist and nutritionist. The daughter of Professor William Alexander Osborne and Ethel Elizabeth Goodson, a medical practitioner and industrial hygienist, she was born Audrey Josephine Osborne in Melbourne and grew up on the campus of the University of Melbourne. She earned a Bachelor of Agricultural Science at the University in 1929 and, later, received a diploma in dietetics. She first worked as a microbiologist and food analyst for Kraft. In 1930, she married Leslie Cahn, an architect. She was employed as chief dietician at St Vincent's Hospital, at the Victorian Mental Hygiene Department and at the Royal Perth Hospital. During World War II, she was chief dietician at the Heidelberg Military Hospital. From