Villarroya is full professor of Biochemistry and Molecular Biology and current scientific director of the Institute of Biomedicine of the University of Barcelona. He obtained his PhD at the University of Barcelona and after post-doc research in CNRS (Paris) and New York University Medical Center, he established a research group on energy metabolism and adiposity. His findings have been published in close to two hundred articles, some of them in major journals such as Cell, Cell Metabolism, Nature Comm, NEJM and Diabetes. Research is supported by local and international agencies, charities and in collaboration with pharmaceutical and biotech companies. He is member of the steering committees of CIBERobn (Spanish institute for obesity research) and SEEDO (Spanish Society for Studies on Obesity), and editorial board member of the journals Endocrinology and Endocrine. He has acted as member of national and international (France, Portugal, Sweden) agencies of research evaluation.