Estimated Average Requirement

Estimated Average Requirement (EAR) is a nutrient intake value that is estimated to meet the requirement of half the healthy individuals in a particular life stage and gender group. Before establishing the Dietary Reference Intakes (DRIs), the EAR is usually the first step.

Definition

The Estimated Average Requirement (EAR) is the intake level for a nutrient at which the needs of 50 percent of the population will be met. Because the needs of the other half of the population will not be met by this amount, the EAR is increased by about 20 percent to arrive at the Recommended Dietary Allowance (RDA).

Purpose

The EAR is used to examine the probability that usual intake is inadequate or excessive. The EAR cut-point method is used to assess the adequacy of nutrient intakes for groups, not for individuals.

Calculation

The EAR is derived from a statistical evaluation of the relationship between nutrient intake and a criterion of adequacy in a population group. The criterion of adequacy is a physiological or functional endpoint that reflects the adequacy of the nutrient intake.

Limitations

The EAR is not a recommended intake, and it is not adequate for all individuals due to variability in requirements.

See also

• Dietary Reference Intakes
• Recommended Dietary Allowance
• Adequate Intake
• Tolerable Upper Intake Levels

References

Estimated Average Requirement Resources
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