Sébastien Dalgalarrodo is a sociologist at CNRS/IRIS/EHESS. His work focuses on the drug market and patient associations: see in particular Sida: la course aux molecules, Paris, EHESS, 2004. He is currently working on the issue of conflict of interest in the health sector. The second part of his research is based on the analysis of professional sport and anti-aging medicine in order to understand the contemporary promise of the optimal body.