Stephan Rössner (born 3 April 1942) is a Swedish physician. He is Professor in Health Related Behavioral Science at Karolinska Institutet in Stockholm, working at the Department of Medicine at the Huddinge campus of the Karolinska University Hospital. He has written several books on the issue and is the leading member of Viktklubben (the Weight Club) at the tabloid Aftonbladet. References 1942 births Living people Obesity researchers 20th-century Swedish physicians Academic staff of the Karolinska Institute 21st-century Swedish physicians