. "C Dietary Intake Data from the Third National Health and Nutrition Examination Survey (NHANES III), 1988–1994." Dietary Reference Intakes for Vitamin C, Vitamin E, Selenium, and Carotenoids. Washington, DC: The National Academies Press, 2000.
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DRI DIETARY REFERENCE INTAKES FOR Vitamin C, Vitamin E, Selenium, and Carotenoids
TABLE C-2 Total (Diet + Supplements) Vitamin C Intake (mg): Mean and Selected Percentiles, United States, NHANES III, 1988–1994
NOTE: Estimated mean and selected percentiles of the usual intake distribution of vitamin C, computed using intakes from food and supplement sources. Dietary intake data are from NHANES III. Intakes from food were adjusted using C-SIDE and the method presented by Nusser SM, Carriquiry AL, Dodd KW, Fuller WA. 1996. A semiparametric transformation approach to estimating usual daily intake distributions. J Am Stat Assoc 91:1440–1449. However, intakes from supplements are unadjusted, so the day-to-day variability in intakes may not have been totally removed from the data. Standard errors were not available for this data set.
