Book excerpt: This book reviews the various applications of nanotechnology in human health. The introductory chapters focus on the classifications, types, synthesis, and characterization of various types of nanomaterials, while subsequent chapters highlight current applications of nanomaterials in the diagnosis and treatment of microbial and viral infections, and also in stem cell biology and regenerative medicine. Further, the book explores the potential role of nanomaterials in connection with neuronal differentiation, neuronal protection, and neurological diseases. It demonstrates the use of nanotechnology to diagnose and treat genetic disorders, as well as endocrine and metabolic syndrome diseases. It also discusses the ethics and the negative impacts of nanomaterials on human health. Lastly, it examines the intellectual property aspects and government regulations associated with the research, design, and commercialization of nanotechnology-based products. Given its scope, it offers a valuable resource for all researchers and professionals working with nanotechnology-based applications in human health.