Dietary Reference Intakes (DRIs) *
mark of adequacy for calcium, and its indicator is desirable calcium retention to the extent that retention can be affected by dietary intake. Each nutrient chapter (Chapter 4, Chapter 5, Chapter 6, Chapter 7 through Chapter 8) identifies the primary indicator or criterion that defines adequacy for the specific life stage and gender group. (See also Table S-1, Table S-2, Table S-3, Table S-4 and Table S-5.)
The RDA is the value to be used in guiding individuals to achieve adequate nutrient intake. RDAs are given separately for specified life stage groups and by gender if applicable; they are intended to apply to healthy individuals. Due to the large variation in intakes, the RDAs are seldom appropriate for planning diets for or assessing the nutrient intakes of free-living groups (Beaton, 1994).
The RDA for each nutrient is set at a value that should be adequate for 97 to 98 percent of all individuals in a life stage group, given a specified definition of adequacy. The RDA is a target or recommended intake. Nutrient intake that is less than the RDA does not necessarily indicate that the criterion of adequacy has not been met by a given individual.
The RDA is expressed as a single absolute value and not in rela-