Dietger Mathias, studied chemistry and medicine in Berlin and Heidelberg, doctorate in both subjects, habilitation in medicine, one-year research stay at New York University with Severo Ochoa. Two years as a research assistant at the Hannover Medical School and 18 years at the University Hospital in Heidelberg. There also further training as a specialist in laboratory medicine/transfusion medicine. From 1992 to 2012, practising physician in Geesthacht and Berlin. Author of numerous non-fiction and specialist books on the subject of nutrition and exercise.