“Dr. Michalsen is one of the best doctors of natural medicine I have ever known. His therapies are based on solid scientific and clinical pillars. In the field of therapeutic fasting, his clinic in Berlin is among the most prestigious in the world and is at the forefront of experimentation and implementation of new scientific discoveries on patients with diseases ranging from hypertension, diabetes, cancer, to multiple sclerosis. This is a book that brings us toward a new approach to medicine, a book that is not to be missed.” —Valter Longo, PhD, author of The Longevity Diet