Dietary Reference Intakes The Essential Guide to Nutrient Requirements (2006) / Chapter Skim
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Pages 466-473
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From page 466... ...
DRIs: THE ESSENTIAL GUIDE TO NUTRIENT REQUIREMENTS 466 TABLE F-1 Conversions Water 1 L = 33.8 fluid oz; 1 L = 1.06 qt; 1 cup = 8 fluid oz Vitamin A and Carotenoids • mg RAE = 1 mg all-trans-retinol • mg RAE = 2 mg supplemental all-trans-b-carotene • mg RAE = 12 mg dietary all-trans-b-carotene • mg RAE = 24 mg other dietary provitamin A carotenoids • mg RAE = mg RE in foods containing only preformed Vitamin A (retinol) • mg RAE = mg RE in foods containing only plant sources (provitamin A carotenoids)
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From page 467... ...
PART IV: APPENDIX F 467 F CONVERSIONS WATER Conversion factors: 1 L = 33.8 fluid oz; 1 L = 1.06 qt; 1 cup = 8 fluid oz. VITAMIN A AND CAROTENOIDS A major change in the extent to which provitamin A carotenoids can be used to form vitamin A is the replacement of retinol equivalents (µg RE)
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From page 468... ...
DRIs: THE ESSENTIAL GUIDE TO NUTRIENT REQUIREMENTS 468 vided by two. As discussed in the following section, this same procedure may be used to adjust intake data that have been analyzed using other databases.
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From page 469... ...
PART IV: APPENDIX F 469 EXISTING DATA PROVIDE VALUES FOR ONLY TOTAL VITAMIN A INTAKE In this situation, there will be more uncertainty associated with estimates of both group mean intakes and the proportion of a group with inadequate intakes. This is because of the lack of information on the proportion of the total vitamin A intake that was derived from carotenoids.
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From page 470... ...
DRIs: THE ESSENTIAL GUIDE TO NUTRIENT REQUIREMENTS 470 VITAMIN E The EARs, RDAs, and AIs for vitamin E are based on a-tocopherol only and do not include amounts obtained from the other seven naturally occurring forms of vitamin E (b-, g-, d-tocopherol and the four tocotrienols)
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From page 471... ...
PART IV: APPENDIX F 471 In addition, the amount of chemically synthesized all rac-a-tocopherol compounds added to foods and multivitamin supplements in milligrams should be estimated at 50 percent to calculate the intake of the 2R-stereoisomers of atocopherol when assessing intakes to meet requirements. If vitamin E in foods, fortified foods, and multivitamin supplements is reported in international units (IUs)
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From page 472... ...
DRIs: THE ESSENTIAL GUIDE TO NUTRIENT REQUIREMENTS 472 1 mg of food folate = 1.0 mg of DFEs 1 mg of folate added as a fortificant or as a supplement consumed = 1.7 mg of DFEs with meals 1 mg of folate supplement = 2.0 mg of DFEs taken without food Diet Assessment of Individuals. When intakes of folate in the diet of an indi vidual are assessed, it is possible to approximate the DFE intake by estimating the amount added in fortification and the amount present naturally as food folate by using the relationship 1 mg of folate added as a fortificant = 1.7 mg of DFEs (the reciprocal of 1 mg of DFEs = 0.6 mg folate added to food)
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From page 473... ...
PART IV: APPENDIX F 473 • 8 slices of bread at 20 mg of added folate per slice (160 mg of total folate) , • 1 serving of moderately fortified ready-to-eat cereal (100 mg of folate)
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