Aloys Berg, Prof. Dr. med., born 1946 in Duisburg. Medical studies, doctorate and habilitation in Freiburg, lives in Waldkirch. He worked and published for several decades as a physician at the University Hospital and at the Institute for Sport and Sports Science at the University of Freiburg on the influence of nutrition on metabolism and risk factors. As a member of the Medical Faculty of the University of Freiburg, he is still active today on the subject of lifestyle management.