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Article By: MelPossehl.
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Vitamins: Part 2
The Dietary Reference Intakes (DRI) were introduced in 1993 as a way to expound on the outdated RDA (Recommended Daily Allowance) of vitamins.
Within the DRI are four sub-categories. We will now explore these:
RDA (now as the Recommended Dietary Allowance) - This is figured to be the daily average intake level of a micronutrient required to meet the need of 97-98% of the healthy people of any given life stage & gender group. It is not a goal for planning or assessing a diet, but a goal for intake.
Adequate Intake Level (AI) - This is based on observed and or experimentally determined estimates of nutrient intake by relatively healthy people that are assumed to be adequate. This estimate is used when there is insufficient evidence to calculate the EAR (see below).
Tolerable Upper Intake Level/UI - Estimated maximum level at which a nutrient is thought to be safe. Increased risk goes up as ingestion goes above this level.
EAR/Estimated Adequate Intake - Excluding pregnant or lactating women and children under 4, this is the average daily nutrient requirement thought to be needed by 50% of any particular gender/life stage group. It's considered to be the most accurate estimation.
In closing it is important to note that these are reference values for planning & assessing diets for a healthy population. The RDA & AI levels should keep a healthy person from developing symptoms of a deficiency, but they are not intended to replenish undernourished people nor may they be adequate for people in states of dis-ease.
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To find out more about vitamins and the new monograms, please click Vitamin Requirements to view. Mel Possehl can educate you on not only Vitamin Requirements, but many other things having to do with nutrition & holistic living! You can get a unique content version of this article.
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