Metabolism is essential for the conversion of food into energy and building blocks of lipids, proteins and nucleic acids. It is also responsible for the elimination of nitrogenous wastes. The field of medicine concerned with the study of hormones along with the functioning and disorders of the endocrine system is called endocrinology. It also studies the psychological or behavioral activities, growth and development, mood, stress, lactation, reproduction and sensory perception caused by hormones. The endocrine system constitutes of several glands that secrete hormones, which affect the actions of several organ systems in the body. Some of the common hormones include insulin, thyroid hormone and growth hormone. The various advancements in endocrinology and metabolism are glanced at in this book, and their applications as well as ramifications are looked at in detail. It strives to provide a fair idea about these disciplines and to help develop a better understanding of the latest researches in these domains. Students, researchers, experts and all associated with these fields will benefit alike from this book.