pWithin the last few years, knowledge about vitamins has increased dramatically, resulting in improved understanding of human requirements for many vitamins. This new edition of a bestseller presents comprehensive summaries that analyze the chemical, physiological, and nutritional relationships, as well as highlight newly identified functions, for all recognized vitamins. These include vitamins A, D, K, E, B6, B12, niacin, riboflavin, thiamine, pantothenic acid, biotin, folate, choline, and ascorbic acid. pKeeping the tradition of the previous volumes, the bHandbook of Vitamins, b bFifth Editionb provides an updated, contemporary perspective on vitamins in human nutrition. Bringing together leading experts in molecular biology, biochemistry, and physiology, the book contains substantial revisions in every chapter, covering vitamin metabolism, including human requirements, clinical aspects of deficiency, vitamin-dependant cell signals and gene regulation, and roles as coenzymes. pThe ch