| 单词 | recommended daily allowance |
| 释义 | recommended daily allowancerec·om·mend·ed daily allowancealso rec·om·mend·ed dietary allowance (rĕk′ə-mĕn′dĭd)recommended daily allowanceallowance[ah-low´ans]rec·om·mend·ed dai·ly al·low·ance (RDA),recommended daily allowancealsorecommended dietary allowance(rĕk′ə-mĕn′dĭd)recommended daily allowanceAny of the guidelines produced by the Food and Nutrition Board of the National Research Council (US) for the amount of a vitamin, mineral or other essential nutrient that should be ingested every day by a normal person engaged in average activities. RDAs are increased for increased activity, body growth and size, pregnancy, lactation, and adverse environmental conditions; RDAs assume a state of wellness and are poorly applicable in sick, traumatised and/or burned patients.A criticism of the RDA is that it was established by the US Food and Nutrition Board in 1941, at a time when sound dieting practices were rare and nutritional deficiencies not uncommon. Malnutrition is now rare in the US, as many foods are supplemented with the necessary vitamins and minerals; many nutritionists now prefer the Daily Value standard. recommended daily allowanceClinical nutrition A guideline of essential nutrients recommended by the Food and Nutrition Board of the National Research Council, for daily ingestion in an idealized normal person engaged in average activities, in a temperate environment for optimal nutrition, in a 'standardized' 70 kg man; RDAs are ↑ for ↑ activity, body growth and size, pregnancy, lactation, and adverse environmental conditions; RDAs are designed for a state of wellness and are poorly applicable in sick, traumatized, or burned Pts. See Daily Value, Minerals, Vitamins. |
| 随便看 |
|
英语词典包含2567994条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。