This modern introductory textbook provides the fundamentals of toxicology, presents common toxicological methods, and thoroughly describes the effects of toxic substances in the body. It also addresses relevant legal regulations and the challenging issue of risk assessment. Tailored to the needs of natural scientists, the book is characterized by the currency of its data and examples, as well as the pedagogically skillful presentation of the material. Significant attention is given to the biological and chemical processes that are fundamental to understanding the subject, as well as to the toxicology of specific substances and substance groups. A chapter on the epidemiology and treatment of poisoning establishes an important connection to medicine. The completely revised new edition largely follows the structure and presentation style of the first edition.