NOTE: Nutrient intake from supplements in NHANES III is collected via an instrument similar to a food frequency questionnaire. Thus, the correct method for combining nutrient intake from food (collected with a 24-hour recall) and nutrient intake from supplements to assess total intake is uncertain. For the specific examples shown above, the following process was followed: (1) usual intakes from food were estimated for each individual using the Nusser et al. (1996) approach; (2) self-reported usual intake from supplements were added to obtain an estimate of the individual's total usual intake; and (3) these total usual intakes were compared to the EAR to obtain an estimate of the prevalence of inadequate intakes. This approach may not be optimal because it assumes that the self-reported usual supplement intake has no day-to-day variability. Therefore, the examples may not provide the best estimate of the prevalence of inadequacy of a nutrient, but they still serve to illustrate the use of the EARs when assessing intakes of groups.