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RDA
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Figure 1: Theoretical frequency distribution of individual requirements (same sex and age group) for (A) a typical essential nutrient and (B) energy. (A) The recommended dietary allowance is set at the upper end of the distribution. For a few nutrientsā€”for example, iron in womenā€”the frequency distribution of requirement is not Gaussian but skewed. (B) The recommended allowance is in the centre of the distributionā€”the mean or medianā€”so that half of the population need more and half need fewer calories per day than the recommended daily allowance (RDA).
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Figure 1: Theoretical frequency distribution of individual requirements (same...
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