When there is not enough research on a nutrient to set a precise RDA, a(n) Adequate Intake (I) is set for the nutrient. (Option C)
When an RDA cannot be determined, adequate intake (AI) is a value based on observed or experimentally determined estimates of nutritional consumption by a group (or groups) of healthy persons.
RDAs are nutritional consumption levels that fulfill the needs of almost all healthy individuals in a given population. When there is insufficient evidence to determine an RDA for a nutrient, we utilize alternate numbers, known as Adequate Intakes (AIs). When there are no RDAs, the AIs are estimates of the required nutritional intakes.
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