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The Dietary Reference Intakes (DRI) were introduced in 1993 as a way to expound on the outdated RDA (Recommended Daily Allowance) of vitamins.

The DRI includes four subcategories, as follows:

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 - Based on experimentally determined or observed estimates of the vitamin intake of healthy people that is assumed to be adequate. Used when EAR cannot be determined.

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.

Estimated Adequate Intake (EAR) - This is the average daily nutrient intake level estimates to meet the requirement of 50% of the individuals in a particular life stage/ gender group. It is population weighed and is considered to be the most accurate reflection of food-nutrient needs of a group, excluding young children and pregnant/lactating women, whose needs differ greatly.

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.

I hope this clears some thing up. For more information on the requirements and sources of each vitamin, stay tuned for upcoming articles, or follow the link provided. Thank You!

Beauty Supplements

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