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| Recommended Dietary Allowances for USA |
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| Recommended Dietary Allowances for USA |
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| (Source: Adapted from Recommended Dietary Allowances, National Research Council, National Academy Press. Washington, D.C. 1989) |
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| (a) The allowances, expressed as average daily intakes over time, are intended to provide for individual variations among most normal persons as they live in the United States under usual environmental stresses. Diets should be based on a variety of common foods in order to provide other nutrients for which human requirements have been less well defined. See text for detailed discussion of allowances and of nutrients not tabulated. |
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| (b) Weights and heights of Reference Adults are actual medians for the U.S. population of the designated age, as reported by National Health and Nutrition Examination Survey (II), 1979. The median weights and heights of those under 19 years of age were taken from Hamill et al. (1979). The use of these figures does not imply that the height-to-weight ratios are ideal. |
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| (c) Conversion of IU to retinol equivalents (RE): 3.33 IU = 1 microgram (µg) of retinol = 1 RE or 6 µg, ß-carotene. |
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| (d) As cholecalciferol. 10 µg cholecalciferol = 400 IU of vitamin D. |
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| (e) µ-Tocopherol equivalents. 1 mg d-µ tocopherol = 1 µ-TE. |
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| (f) 1NE (niacin equivalent) is equal to 1 mg of niacin or 60 mg of dietary tryptophan. |
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