Dr. Andreas Michalsen - one of the world's leading experts on fasting - lays out the clear, indisputable science that fasting, when combined with a healthy diet, is the key to healing chronic illnesses and living longer. Michalsen draws from his decades of medical practice and original, cutting-edge scientific research, along with his deep knowledge about the human body and evolutionary history to distill the simple truth about what we should eat and how we should eat in order to live healthier, longer lives.