"Since 1941, with the publication of the first edition of Recommended Dietary Allowances (RDAs), the Food and Nutrition Board has been recognized as one of the most authoritative sources of information on quantitative recommendations for nutrient intakes for healthy people." "This volume of Dietary Reference Intakes includes calcium, phosphorus, magnesium, vitamin D, and fluoride." "For each nutrient evaluated, the book presents what is known about how the nutrient functions in the human body, what the best method is to determine its requirement, which factors (caffeine or exercise, for example) may affect how it works, and how the nutrient may be related to chronic disease or developmental abnormalities." "Based on analysis of nutrient metabolism in humans and data on intakes in U.S. and Canadian populations, recommended intakes for each age group - from the first days of life through childhood, sexual maturity, midlife, and the later years - are proposed. The book also identifies a new reference intake, the UL (Tolerable Upper Intake Level), which if consumed consistently, may result in adverse effects."--Jacket.