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ensure accuracy. Dietary Reference Intakes for Water, Potassium,
Sodium, Chloride, and Sulfate lar) is usually assumed for
nutrient requirements. At this level of intake, half of the
members of a specified group would not have their nutritional
needs met. The general method used to set the EAR is the same
for all the nutrients. For many of the nutrients, including
those in this report, there are few direct data on the
requirements of children. Thus, for such nutrients, EARs and
RDAs for children are based on extrapolations from adult values.
The methods used for extrapolation are described in Chapter 2.
Method for Setting the RDA When Nutrient Requirements Are
Normally Distributed If the requirement for the nutrient is
normally distributed, and the standard deviation (SD) of the EAR
is available, the RDA is defined as equal to th