简述膳食营养素参考摄入量。
①平均需要量EAR:是制定RNI的基础;②推荐摄入量RNI:相当于传统的RDA,是个体每日该营养素摄入量的目标值;③透宜摄入量AI可代替RNI,作为个体营养素摄入量的目标值;④可耐受最高摄入量:指平均每日摄入营养素的最高限量。
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