RECOMMENDED DIETARY ALLOWANCES (RDAs) A term used to denote recommendation for 26 nutrients for 18 different population subgroups, RDAs are based on information on nutrient allowances for healthy people from the National Research Council of the National Academy of Sciences. This information is revised about every five years and is used to determine the Daily Value and Reference Daily Intake figures used on food labels. —see Recommended Daily Allowances ( U.S. RDAs)