When estimating inadequate intake levels in adults, which dietary guideline is most appropriate?

The Estimated Average Requirement (EAR) is the appropriate guideline for estimating inadequate intake levels in adults. The EAR represents the nutrient intake value that is estimated to meet the requirement of half the healthy individuals in a particular life stage and gender group. This makes it a useful reference point for assessing whether a population is consuming adequate amounts of a nutrient.

When evaluating nutrient intakes on a population level or for individuals, the EAR can identify those whose intake may be below the threshold necessary to meet their needs. If the intake level of a nutrient is below the EAR, it indicates that there is a higher likelihood that individuals may be at risk of deficiency.

Other dietary guidelines serve different purposes. The Recommended Dietary Allowance (RDA) is set higher than the EAR and is intended to cover the needs of nearly all (97-98%) healthy individuals, which makes it less useful for assessing inadequate intake levels. The Tolerable Upper Intake Level (UL) is designed to prevent toxicity from excessive intake but does not provide information about inadequate intake. The Acceptable Macronutrient Distribution Range (AMDR) focuses on macronutrients and their distribution in the diet, rather than micronutrient deficiency. Therefore, the EAR is the most appropriate choice for estimating inadequate intake levels