Joffrey Zoll is an MD-PhD in physiology at the Faculty of Medicine of Strasbourg, France. He is a researcher in EA3072 headed by Prof. Bernard Geny. He is an expert on the effects of exercise and nutrition. He has worked for 20 years in the field of muscle metabolism, whether in animal models or in healthy and sick humans (cardiovascular and metabolic diseases), and published more than 80 publications. He is more particularly a specialist in mitochondrial function and the various associated energy pathways (carbohydrate and lipid pathways). For several years now, he has been interested in the deleterious effects of taking sugar associated with taking lipids in obesity models and he has characterized at the hepatic and muscular mitochondrial level the beneficial effects of taking medium-chain fatty acids. For 3 years, he has worked to better understand the molecular pathways involved in the beneficial effects of the ketogenic diet and intermittent fasting in mice models. He is part of the Biological Society of Strasbourg and gives numerous conferences on the subject of nutrition and in particular on the harmful effects of taking added sugar.