Prof. Dr. Michalsen is the head physician of the Department of Naturopathy at the Immanuel Hospital Berlin and holder of the endowed professorship for clinical naturopathy at the Institute for Social Medicine, Epidemiology and Health Economics of the Charité-Universitätsmedizin Berlin, Germany. His specialties include homeopathy, physical medicine and balneology, nutritional medicine, acupuncture and mind-body medicine.