Dr. John Speakman, a British biologist, is the Director of the Shenzhen Key Laboratory of Metabolic Health at the Chinese Academy of Sciences in Shenzhen, China and serves as a professor in the School of Biological Sciences at the University of Aberdeen in Scotland. His research focuses on energy balance, exploring factors influencing food intake and energy expenditure, and their implications for fat storage (obesity) and other physiological parameters such as oxidative stress and aging.