出典:Wiktionary
出典:『Wiktionary』 (2010/04/26 03:15 UTC 版)
essential nutrient (複数形 essential nutrients)
出典:Wikipedia
出典:『Wikipedia』 (2011/07/25 16:27 UTC 版)
An essential nutrient is a nutrient required for normal body functioning that either cannot be synthesized by the body at all, or cannot be synthesized in amounts adequate for good health (e.g. niacin, choline), and thus must be obtained from a dietary source. Essential nutrients are also defined by the collective physiological evidence for their importance in the diet, as represented in e.g. US government approved tables for Dietary Reference Intake.