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Pages 485-486

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From page 485...
... PART IV: APPENDIX H 485 H STANDARD DEVIATION OF REQUIREMENTS FOR NUTRIENTS WITH AN EAR Standard Deviation (SD) of requirements is calculated from the Coefficient of Variation (CV)
From page 486...
... DRIs: THE ESSENTIAL GUIDE TO NUTRIENT REQUIREMENTS 486 Basis if not 10 percenta Nutrient with an EAR CV (percent) Niacin 15 Limited studies suggest greater variation than 10 percent, partly from wide variation in conversion efficiency of tryptophan to niacin Riboflavin 10 Thiamin 10 MINERALS Copper 15 Limited data to set EAR Iodine 20 Calculation that subtracts out variation due to experimental design Iron Skewed distribution; calculated by modeling components of requirement distribution, estimating the requirement for absorbed iron at the 97.5 percentile, and with use of an upper limit of 18 percent iron absorption, and rounding Magnesium 10 Molybdenum 15 Limited data to set EAR (few Mo levels in depletion/repletion study and small number of subjects)

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