Dietary Reference Intakes for Vitamin C, Vitamin E, Selenium, and Carotenoids (2000) / Chapter Skim
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1 Introduction to Dietary Reference Intakes
1 Introduction to Dietary Reference Intakes
Pages 21-34
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From page 21... ...
This comprehensive effort is being undertaken by the Stancling Committee on the Scientific Evaluation of Dietary Reference Intakes (DRI Committee) of the Food and Nutrition Board, Institute of Medicine, the National Academies, with the active involvement of Health Canada.
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Although the RDA or AI may serve as the basis for such guidance, qualified personnel should make necessary adaptations for specific situations. CATEGORIES OF DIETARY REFERENCE INTAKES Each type of Dietary Reference Intake (DRI)
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From page 23... ...
Estimated Average Requirement ~ The Estimated Average Requirement (EATS is the ciaily intake value that is estimated to meet the requirement, as clefineci by the specifieci indicator of acloquacy, in half of the apparently healthy incliviciuals in a life stage or gentler group (see Figure 1-1~. A normal or symmetrical distribution (meclian and mean similar)
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o ;II o Q ID (a -0.5 ~ m _ _ ID c) (a - O FIGURE 1-1 Dietary reference intakes.
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of apparently healthy people. In the judgment of the DRI Committee, the AI for children and adults is expected to meet or exceed the amount needed to maintain a defined nutritional state or criterion of acloquacy in essentially all members of a specific, apparently healthy population, because it is set using presumably healthy populations.
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From page 26... ...
Also, the RDA is always calculated from the EAR, using a formula that takes into account the expected variation in the requirement for the nutrient (see previous section "Estimated Average Requirement". To;terab;te Upper Intake [event The Tolerable Upper Intake Level (UL)
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From page 27... ...
These nutrients, their role in health, and the types of evidence considered are discussed in Chapter 2. PARAMETERS FOR DIETARY REFERENCE INTAKES Life Stage Categories The life stage categories described below were chosen by keeping in mind all the nutrients to be reviewed, not only those included in this report.
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From page 28... ...
In general, for this report, special consideration was not given to possible variations in physiological need during the first month after birth or to the variations in intake of nutrients from human milk that result from differences in milk volume and nutrient concentration during early lactation. Specific Dietary Reference Intakes (DRIB)
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From page 29... ...
for continued human milk feeciing of infants through 9 to 12 months of age with appropriate introcluction of solici foocis. One problem encountered in trying to derive intake data in infants was the lack of available data on total nutrient intake from a combination of human milk and solici foocis in the second 6 months of life.
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From page 30... ...
All children continue to grow to some extent until as late as age 20; therefore, having these two age categories span the period 9 through 18 years of age seems justified. Young Adulthood and Middle Ages: Ages 19 through 30 Years and 3' through 50 Years The recognition of the possible value of higher nutrient intakes during early adulthood on achieving optimal genetic potential for
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From page 31... ...
In setting EARs for these life stages, however, consideration is given to adaptations to increased nutrient clemanci, such as increased absorption, and to greater conservation of many nutrients. Moreover, some nutrients may undergo net losses due to physiological mechanisms regardless of the nutrient intake.
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b Calculated from body mass index and height for ages 4 through 8 and older. The meclian heights for the life stage and gentler groups through age 30 were iclentifieci, and the meclian weights for these heights were baseci on reported meclian Body Mass Inclex (BMI)
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From page 33... ...
SUMMARY Dietary ReferrenceIntakes (DRIB) is a generic term for a set of nutrient reference values that includes the RecommenclecT Dietary A1lowance, Acloquate Intake, Tolerable Upper Intake Level, and EstimatecT Average Requirement.
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From page 34... ...
1997. Randomized trial of varying mineral intake on total body bone mineral accretion during the first year of life.
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