He has a rather eclectic professional career as a hospital pharmacist and lecturer in clinical pharmacy at the University of Paris XI in the 1980s and 1990s, as well as in the industrial sector for about ten years (director of research and development in the company Oenobiol), then within the Danone Group as director of research in health-nutrition and finally in a subsidiary of the Institut Pasteur (PasteurMed) as medical director.