An exposure to a toxin or excess amount of a nutrient that is short term, perhaps as short as one day or one dose. In this report it generally refers to total exposure (diet plus supplements) on a ...

Vitamin D and calcium have been the focus of much research since the Institute of Medicine set nutritional reference values for them in 1997. Known as Dietary Reference Intakes, the values for these ...

Visit NAP.edu/10766 to get more information about this book, to buy it in print, or to download it as a free PDF. This report is one of a series designed to provide guidance on the interpretation and ...