Dietary Reference Intakes: Guiding Principles for Nutrition Labeling and Fortification

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Dietary Reference Intakes: Guiding Principles for Nutrition Labeling and Fortification (2003)
Food and Nutrition Board (FNB)

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. "Appendix B: Selected Illustrative Calculations Using a Population-Weighted Approach." Dietary Reference Intakes: Guiding Principles for Nutrition Labeling and Fortification. Washington, DC: The National Academies Press, 2003.

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Dietary Reference Intakes: Guiding Principles for Nutrition Labeling and Fortification

TABLE B-6 Illustrative Calculations of Population-Weighted Estimated Average Requirements (EARs) and of Highest EAR for Nutrients for Lactating Women in the United States

Nutrient^a	Median Weighted EAR	Percent Within 20%^b	Percent Within 30%^c	Highest EAR	Percent Within 20%^d	Percent Within 30%^e
Vitamin A (μg RAE)	899	68	87	900	68	87
Vitamin C (mg)	100	95	99.7	100	95	99.7
Vitamin E (mg α-tocopherol)	16	95	99.7	16	95	99.7
Thiamin (mg)	1.2	95	99.7	1.2	95	99.7
Riboflavin (mg)	1.3	95	99.7	1.3	95	99.7
Niacin (mg)	13	82	95	13	82	95
Vitamin B₆ (mg)	1.7	95	100	1.7	95	100
Folate (μg DFE)	450	95	99.7	450	95	99.7
Vitamin B₁₂ (μg)	2.4	95	99.7	2.4	95	99.7
Copper (μg)	999	95	99.7	1,000	95	99.7
Iodine (μg)	209	95	99.7	209	95	99.7
Iron (mg)	6.5	95	99.7	7.0	92	99
Magnesium (mg)	260	94	99	300	77	97
Molybdenum (μg)	36	95	99.7	36	95	99.7
Phosphorus (mg)	583	92	96	1,055	3.6	4.1
Selenium (μg)	59	95	99.7	59	95	99.7
Zinc (mg)	10.4	95	99.7	10.9	94	99.6
NOTE: Computations are based on approximation. Proportion of lactating women for each age group was assumed to be the same as the proportion of pregnant women (proportion of births stratified by mother’s age in three age groups: 18 y, 19–30 y, 31–50 y) using data from Ventura and colleagues (2003). ^aRAE = retinol activity equivalents, DFE = dietary folate equivalents. ^bEstimated proportion of the population with a requirement within 20% of the population-weighted EAR. ^cEstimated proportion of the population with a requirement within 30% of the population-weighted EAR. ^dEstimated proportion of the population with a requirement within 20% of the highest EAR. ^eEstimated proportion of the population with a requirement within 30% of the highest EAR.