With the public now exposed to toxic metals, it is important to prevent and control these injuries. Biomarkers are undoubtedly recognized as important tools to achieve these goals. This book is intended for scientists, toxicologists, physicians, pharmacists, government regulators, and other public health professionals. The first part of the book covers the general nature of toxic metal biomarkers, while parts 2 and 3 cover biomarkers for xenobiotic metals and toxic essential metals, respectively. Part 4 focuses on new approaches to metal biomarkers.