![]() ![]() RDAs for vitamin E are provided in milligrams (mg) and are listed in Table 1. Naturally sourced vitamin E is called RRR-alpha-tocopherol (commonly labeled as d-alpha-tocopherol) the synthetically produced form is all rac-alpha-tocopherol (commonly labeled as dl-alpha-tocopherol). Acknowledging "great uncertainties" in these data, the FNB has called for research to identify other biomarkers for assessing vitamin E requirements. The FNB based these recommendations primarily on serum levels of the nutrient that provide adequate protection in a test measuring the survival of erythrocytes when exposed to hydrogen peroxide, a free radical. The FNB's vitamin E recommendations are for alpha-tocopherol alone, the only form maintained in plasma. Tolerable Upper Intake Level (UL): Maximum daily intake unlikely to cause adverse health effects.Estimated Average Requirement (EAR): Average daily level of intake estimated to meet the requirements of 50% of healthy individuals usually used to assess the nutrient intakes of groups of people and to plan nutritionally adequate diets for them can also be used to assess the nutrient intakes of individuals. ![]()
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