Vitamin D: The Calcium Homeostatic Steroid Hormone provides a continuing coordinated group of edited critiques of the dynamic state of the science and art of nutrition. The most recent basic advances will be reviewed within the broad framework of the scientific knowledge of food and nutrition, including its application to man, individually and societally. The volumes, authored singly or by invited contributors, will appeal to serious scholars concerned with pure or applied nutrition. This volume comprises 13 chapters, with the first discussing the progress of vitamin D-cholecalciferol from vitamin to steroid hormone. Succeeding chapters then discuss the biological and chemical assay of vitamin D, its metabolites, and analogs; metabolism of vitamin D; and the tissue and subcellular localization of vitamin D and its metabolites. Other chapters cover binding proteins and receptors for vitamin D and its metabolites; interrelationships between vitamin D and other hormones; intestinal effects of vitamin D; vitamin D actions in the kidney; vitamin D actions on bone; and vitamin D and its clinical relationships. This book will be of interest to practitioners in the fields of chemistry, nutrition, and medicine.