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每天选择多种水果和蔬菜:了解其中的复杂性。

Choose a variety of fruits and vegetables daily: understanding the complexities.

作者信息

Krebs-Smith S M, Kantor L S

机构信息

Risk Factor Monitoring and Methods Branch, National Cancer Institute, Bethesda, MD 20892-7344, USA.

出版信息

J Nutr. 2001 Feb;131(2S-1):487S-501S. doi: 10.1093/jn/131.2.487S.

Abstract

The 2000 edition of Nutrition and Your Health: Dietary Guidelines for Americans is the first to include a recommendation aimed specifically at fruits and vegetables, apart from grains. This paper discusses these changes in the Dietary Guidelines, summarizes the methods of assessment pertaining to fruit and vegetable intakes and their related factors, and reviews the data available on current levels and trends over time. Recent methodological advances in the measurement of both the aggregate U.S. food supply and foods consumed by individuals have allowed for better estimates with which recommendations can be compared. The data on individual intakes suggest the following: Americans are consuming fruits and vegetables at a level near the minimum recommendations; to be in concordance with energy-based recommendations, they would have to consume approximately 2 more servings per day; and dark green and deep yellow vegetables are accounting for a disproportionately small share of the total. Fruit and vegetable consumption appears to be rising, but only slightly, and this increase might be only an artifact of shifts in the population demographics. A number of studies suggest that low income households in poor central cities and sparsely populated rural areas often have less access to food stores and face higher prices for food, including fruits and vegetables, compared with other households. At the aggregate level, supplying enough fruits and vegetables to meet dietary recommendations for all U.S. consumers would require adjustments in U.S. agricultural production, trade, marketing practices and prices of these commodities.

摘要

《营养与你的健康:美国人膳食指南》2000年版首次纳入了一项专门针对水果和蔬菜(谷物除外)的建议。本文讨论了膳食指南中的这些变化,总结了与水果和蔬菜摄入量及其相关因素有关的评估方法,并回顾了有关当前摄入量水平和随时间变化趋势的现有数据。美国食品总供应量和个人消费食品测量方面最近的方法进展,使得能够做出更好的估计,以便与建议进行比较。关于个人摄入量的数据表明:美国人目前摄入水果和蔬菜的量接近最低建议水平;要符合基于能量的建议,他们每天需要多摄入约两份;深绿色和深黄色蔬菜在总量中所占份额过小。水果和蔬菜的消费量似乎在上升,但幅度很小,而且这种增长可能只是人口结构变化造成的假象。一些研究表明,与其他家庭相比,贫困中心城市的低收入家庭和人口稀少的农村地区家庭往往较难进入食品商店,购买包括水果和蔬菜在内的食品价格更高。在总体层面上,要提供足够的水果和蔬菜以满足所有美国消费者的膳食建议,就需要对美国的农业生产、贸易、营销做法以及这些商品的价格进行调整。

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