This book delves into the methods of synthesis and functionalization of superparamagnetic materials, offering a deep understanding of their properties and applications. It explores the behavioral study of these materials and provides valuable insights into their diverse applications across various fields. A dedicated section focuses on in vitro and in vivo assessment, toxicology considerations, and post-application aspects. Furthermore, the book summarizes the current development of superparamagnetic materials, including an overview of ongoing clinical trials.