Vuk Vrhovac (13 November 1903 – 26 May 1952) was a Croatian physician, pioneer of diabetology and the organizer of the domestic production of insulin and liver preparations in the 1930s in Yugoslavia. In 1933 and 1934 as a fellow of the Rockefeller foundation he studied at the University of Toronto in Frederick Banting’s laboratory. He also visits other academic institutions in the United States and Canada. Upon return, he organized the first Yugoslav insulin in Zagreb in 1935. The insulin is standardized according to the League of Nations recommendations in 1940 (Insulin-Zagreb). In 1940, he