![]() ![]() ![]() To determine the difference between the new and previous measures of vitamin E expected in a daily diet, menus typical of American adults were calculated using NDS-R. New values for vitamin E were added to all 18 000 foods in the database. Researchers using the NDS-R have the option of calculating vitamin E using the new measures of activity or using the prior α-TE values for comparison of current data with previously published values. For analysis of trends, the new nutrient fields for vitamin E were added to previous versions of the database and to deactivated foods, and α-TE was maintained in the current database. For foods fortified with synthetic vitamin E, product formulations were used to calculate first the amount of natural vitamin E in the food the remainder of vitamin E on the product label was attributed to synthetic α-tocopherol. In unfortified foods, all α-tocopherol was considered to be the natural form. New nutrient fields were added to the database to separate α-tocopherol values into natural and synthetic forms, each with a different level of vitamin E activity. The new DRIs required NDS-R database changes for recalculation of vitamin E activity, while retention of original values was required for comparability with data collected in the past. The Nutrition Data System for Research (NDS-R) developed by the Nutrition Coordinating Center at the University of Minnesota is used to calculate nutrient intakes for studies investigating relationships between diet and health. This definition contrasts with the previous measure of vitamin E, α-tocopherol equivalents ( α-TEs), which includes all forms of α-tocopherol and contributions from other tocopherols. The 2000 release of new Dietary Reference Intakes (DRIs) for Americans and Canadians redefines vitamin E activity based solely on naturally occurring α-tocopherol and 2R-stereoisomeric forms of synthetic α-tocopherol. ![]()
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