Book excerpt: The aim of this important book is to present the reader with developments concerning glutathione research. This work focuses on the synthesis-degradation and oxidation-reduction cycles of glutathione, the physiological functions of glutathione (especially in mammalian cells), and the analytical methods used to accurately measure the glutathione status of cells. This resource addresses specific modification of glutathione metabolism that is of special interest in the treatment of some tumors. This rare volume also introduces some different, new techniques on how to accurately measure glutathione, specifically in its oxidized form. Anyone involved with biochemistry, physiology, toxicology, pharmacology, nutrition and radiation biology will find this publication interesting and filled with useful information. It is also a valuable reference for research scientists in such fields as aging, metabolism disorders, and glutathione research.