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Reference Daily Intake. The Reference Daily Intake or Recommended Daily Intake (RDI) is the daily intake level of a nutrient that was considered in 1968 to be sufficient to meet the requirements of 97â98% of healthy individuals in every demographic in the United States.
Recommended Daily Intakes and Upper Limits for Nutrients. What is the right amount of a vitamin or mineral to get each day? To help you, below are recommended intake levels for selected nutrients based on RDAs (Recommended Dietary Allowances) from the Institute of Medicine (IOM) of the National Academy of Sciences. In cases where no RDA is established, the IOM has developed AIs (Adequate Intake) levels, which are shown.