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DRI DIETARY REFERENCE INTAKES FOR Vitamin C, Vitamin E, Selenium, and Carotenoids
nutrient intake of groups; the RDA is not appropriate. The prevalence of inadequacy may be estimated by determining the percentage of the population below the EAR as follows:
Based on the Third National Health and Nutrition Examination Survey (NHANES III) data, about 11 percent of nonsmoking
Box S-2 Uses of Dietary Reference Intakes for Healthy Individuals and Groups
Type of Use
For the Individual
For a Group
Assessment
EARa: use to examine the possibility of inadequacy of reported intake.
EARb: use to estimate the prevalence of inadequate intakes within a group.
AIa: intakes at this level have a low probability of inadequacy.
AIb: mean intake at this level implies a low prevalence of inadequate intakes.
ULa: intake above this level has a risk of adverse effects.
ULb: use to estimate the prevalence of intakes that may be at risk of adverse effects.
Planning
RDA: aim for this intake.
EAR: use in conjunction with a measure of variability of the group's intake to set goals for the median intake of a specific population.
AI: aim for this intake.
UL: use as a guide to limit intake; chronic intake of higher amounts may increase risk of adverse effects.
EAR = Estimated Average Requirement
RDA = Recommended Dietary Allowance
AI = Adequate Intake
UL = Tolerable Upper Intake Level
a Requires accurate measure of usual intake. Evaluation of true status requires clinical, biochemical, and anthropometric data.
b Requires statistically valid approximation of usual intake.
