Purdue University, West Lafayette, IN, USA.
J Nutr. 2012 Nov;142(11):2065S-2072S. doi: 10.3945/jn.112.164442. Epub 2012 Sep 18.
Processed foods are an integral part of American diets, but a comparison of the nutrient contribution of foods by level of processing with the recommendations of the Dietary Guidelines for Americans regarding nutrients to encourage or to reduce has not been documented. The mean reported daily dietary intakes of these nutrients and other components were examined among 25,351 participants ≥2 y of age in the 2003-2008 NHANES to determine the contribution of processed food to total intakes. Also examined was the percent contribution of each nutrient to the total reported daily nutrient intake for each of the 5 categories of food that were defined by the level of processing. All processing levels contributed to nutrient intakes, and none of the levels contributed solely to nutrients to be encouraged or solely to food components to be reduced. The processing level was a minor determinant of individual foods' nutrient contribution to the diet and, therefore, should not be a primary factor when selecting a balanced diet.
加工食品是美国家庭饮食的重要组成部分,但尚未有文献对加工水平不同的食物的营养素贡献与《美国人膳食指南》中关于鼓励或减少的营养素的建议进行比较。本研究对 2003-2008 年 NHANES 中≥2 岁的 25351 名参与者的这些营养素和其他成分的日常饮食摄入量进行了调查,以确定加工食品对总摄入量的贡献。还分析了 5 类加工食品中每种营养素对总报告日营养素摄入量的百分比贡献,这 5 类食品是根据加工水平来定义的。所有加工水平都对营养素摄入量有贡献,没有任何一个水平仅对鼓励的营养素或仅对减少的食物成分有贡献。加工水平是食物对饮食中营养素贡献的一个次要决定因素,因此,在选择均衡饮食时,不应该作为一个主要因素。