RDA covers ~97% of healthy people. AI is used when data are thinner. UL is the highest daily intake unlikely to cause harm — not a target.
Daily Value
%DV on US labels uses one reference number for everyone — useful to compare foods, not a personal target.
Evidence & sources
The RDA is the average daily intake sufficient to meet the needs of nearly all (97–98%) healthy individuals. Evidence: established. Known: Definition. Unknown: — Source: NIH Office of Dietary Supplements, Nutrient Recommendations and Databases (Current revision).