Phosphorus is an essential element occurring in most foods. In typical Western diets, it is not harmful but does adversely affect tissues in the body when given in excess or paucity. This book provides a comprehensive review of various aspects of phosphorus in relation to human nutrition. Sections cover phosphorus nutrition and dietary issues, health risks associated with phosphorus, phosphorus intake in populations at risk, regulatory challenges and policy approaches, and environmental impacts of phosphates in the modern food supply.