Vitamin D, a steroid hormone, has mainly been known for its effects on bone and osteoporosis. The current therapeutic practices expand into such markets as cancer research, pediatrics, nephrology, dermatology, immunology, and genetics. This second edition includes over 100 chapters covering everything from chemistry and metabolism to mechanisms of action, diagnosis and management, new analogs, and emerging therapies. This complete reference works is a must have resource for anyone working in endocrinology, osteology, bone biology, or cancer research.*Most comprehensive, up-to-date two-volume set on Vitamin D*New chapters on squamous cell cancer, brain cancer, thyroid cancer and many more*Further sections on emerging uses for treatments of auto-immune diseases and diabetes*Over 600 illustrations and figures available on CD