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Dietary Reference Intakes for Calcium, Phosphorus, Magnesium, Vitamin D, and Fluoride
Since the publication of the last version of the U.S. Recommended Dietary Allowances (NRC, 1989a) and of the Canadian Recommended Nutrient Intakes (Health Canada, 1990), there has been a significant expansion of the research base, an increased understanding of nutrient requirements and food constituents, and a better appreciation for the different types of nutrient data needed to address the applications of dietary reference values for individuals and population groups. There are now convincing reasons to conclude that past approaches to establishing and applying the RDAs can be improved
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