Vitamin E DRI
Vitamin E DRI
In the year 2000, the National Academy of Sciences Institute of Medicine released the following new Adequate Intake (AI) levels for infants up to 1 year old and Recommended Daily Allowances (RDAs) for all older individuals.
Group Vitamin E AI
0-6 months 4 mg (6 IU)
6-12 months 5 mg (7.5 IU)
Group Vitamin E RDA
1-3 years 6 mg (9 IU)
4-8 years 7 mg (10.5 IU)
9-13 11 mg (16.5 IU)
Age 14+ (M and F) 15 mg (22.5 IU)
Pregnant females 15 mg (22.5 IU)
Lactating females 19 mg (28.5 IU)
Even though plants contain all eight naturally occurring vitamin E compounds, these AI and RDA values are based solely on the alpha-tocopherol form of vitamin E. Alpha-tocopherol, which is also the primary form of vitamin E found in animal tissue, is the only form recognized as vitamin E by the National Academy of Sciences and the Food and Nutrition Board. These RDAs generally exceed those previously issued by the Institute of Medicine in 1998 to allow for increased intake of polyunsaturated fatty acids (PUFAs), which increases the need for vitamin E.
In addition to the AI and RDA values, the FDA has indicated 30 mg as the reference value for nutrition labeling for this vitamin. This is the recommended intake value used by the FDA for the purpose of calculating the % of the DV of vitamin E to be used on food labels.
The Institute of Medicine has established an Upper Intake Level (UL) for vitamin E of 1,000 mg (1,500 IU) for adults age 19 and older. This UL applies to supplementary vitamin E only, not vitamin E appearing in food naturally.
The fact that the UL has been set at 1,000 mg does not mean, however, that this is the amount you should be taking daily (unless your doctor determines that it is medically necessary). It should be noted that this UL far exceeds the amount determined to be safe based on extensive data analysis gathered from multiple studies on 135,967 participants. Randomly controlled vitamin E supplement dosage in these samples varied from 16.5 to 2,000 IUs/day with 400 IUs the most frequent amount. Mortality was significantly greater for those taking more than 250 IUs/day.