Author David Hoffman details the intricate chemistry behind herbalism, providing for the first time important background and insights into how herbal remedies are able to achieve their results and the limitations and potential of viewing herbs chemically. He presents in-depth discussions of specific ailments and treatments organized by each of the major body systems, as well as delving into the special needs of children and the elderly. His material medica presents 150 of the most beneficial herbs used in treatment practices, identifying not only their present uses but also their historical derivations.