Susan Ann Jebb OBE is Chair of the United Kingdom's Food Standards Agency and Professor of Diet and Population Health at the Nuffield Department of Primary Care Health Sciences, University of Oxford.

[1] At the Dunn Clinical Nutrition Centre in the early 1990s, she worked with Sally Poppitt, where she became head of obesity research.

[5][6][7] Her more recent work has studied how our perception of portion size as normal or smaller than normal can affect the amount of food we eat, and how shoppers can be influenced to choose decreased salt alternatives at the grocery store.

In January 2023, her comments were the subject of some media attention after she appeared to compare bringing cake into the workplace to passive smoking.

[15] Susan Jebb has won the international 2015 John Maddox Prize for courage in promoting science and evidence on a matter of public interest.