Centuries ago, predicting was an enterprise entrusted to magic and fortune tellers, while today it is the domain of knowledge to which researchers and scientists contribute daily, analyzing and interpreting pathologies, trying to decode the complexity of life, represented by unresolved problems. Regenerating damaged organs and tissues, an act that was also once called magic, is now entrusted to the same scientists and translational surgeons who, through the entrance of the laboratory in the operating room, have allowed us to move from replacement surgery (hair transplant) to regenerative surgery (hair re-growth) with cell therapies and tissue engineering. The passion for Regenerative Plastic Surgery and for the treatment of some pathologies addressed by it, such as Alopecia, has led, over the years, the author and publisher Prof. Pietro Gentile to better investigate, through rigorous scientific studies, the possible new autologous therapies in the treatment of alopecia. This book represents all the latest knowledge in the treatment and prevention of Alopecia, transmitted by all the experts who have decided to contribute to the realization of this work. The visionary idea of this text is therefore to provide the state of the art at the end of the year 2019 in the field of Alopecia.