Dr Jean Joyeux is a micronutritionist (DU) and dietitian (DE), academic director of the École de Nutrition Holistique de Genève (ENH) and a lecturer on the Food, Health and Micronutrition university diploma at the Université de Bourgogne. With an initial medical training, he works with patients in consultation as well as elite athletes, and has co-authored several books with Prof Henri Joyeux, including Manger mieux de 0 à 100 ans and Votre foie a besoin d'amour.