Dietary Reference Intakes for Thiamin, Riboflavin, Niacin, Vitamin B6, Folate, Vitamin B12, Pantothenic Acid, Biotin, and Choline (1998) / Chapter Skim
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1 Introduction to Dietary Reference Intakes
1 Introduction to Dietary Reference Intakes
Pages 17-26
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From page 17... ...
The development of DRIs expands on the periodic reports called Recommended Dietary Allowances, which have been published since 1941 by the National Academy of Sciences. This comprehensive effort is being undertaken by the Standing Committee on the Scientific Evaluation of Dietary Reference Intakes of the Food and Nutrition Board, Institute of Medicine, National Academy of Sciences, with the involvement of Health Canada.
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Recommended Dietary Allowance The Recommended Dietary Allowance (RDA) is the average daily dietary intake level that is sufficient to meet the nutrient requirement of nearly all (97 to 98 percent)
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At intakes above the UL, the risk of adverse effects may increase. in half of the healthy inclivicluals in a life stage or gentler group (see Figure 1-1~.
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, which contributes about two-thirds of the daily energy expenditure of many individuals residing in Canada and the United States (Ella, 1992) and on the similar CV of 12.5 percent estimated for the protein requirements in adults (FAO/ WHO/UNA, 1985~.
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In the opinion of the committee, the AI for children and adults is expected to meet or exceed the amount neecleci to maintain a clefineci nutritional state or criterion of acloquacy in essentially all members of a specific healthy population. Examples of clefineci nutritional states include normal growth, maintenance of normal circulating nutrient values, or other aspects of nutritional well-being or general health.
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is the highest level of ciaily nutrient intake that is likely to pose no risk of adverse health effects in almost all inclivicluals in the specified life stage group (see Figure 1-1~. As intake increases above the UL, the risk of adverse effects increases.
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From page 23... ...
With the acquisition of new ciata, such as ciata relating intake to chronic disease or disability, the choice of the criterion for setting the EAR may change. PARAMETERS FOR DIETARY REFERENCE INTAKES Life Stage Groups Reference nutrient intakes are expressed for 16 life stage groups,2 as listed in Table 1-1 and clescribeci in more detail in the first report in this series (IOM, 1997~.
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in the United States. The meclian heights for the life stage and gentler groups through age 30 years were iclentifieci, and the meclian weights for those heights were baseci on meclian body mass inclex for the same inclivicluals.
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From page 25... ...
The reference weights chosen for this report were baseci on the most recent ciata set available from either country, recognizing that earlier surveys in Canada inclicateci shorter stature and lower weights cluring adolescence than clici surveys in the United States. Reference weights are used primarily when setting the Estimated Average Requirements (EARs)
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From page 26... ...
, Tolerable Upper Intake Level (UL) , and Estimated Average Requirement (EAR)
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