有机食品未必更有营养
英语课
Organic food has no nutritional 1 or health benefits over ordinary food, according to a major study published Wednesday.
Organic food has no nutritional or health benefits over ordinary food, according to a major study published Wednesday.
Researchers from the London School of Hygiene 2 & Tropical Medicine said consumers were paying higher prices for organic food because of its perceived health benefits, creating a global organic market worth an estimated $48 billion in 2007.
A systematic 3 review of 162 scientific papers published in the scientific literature over the last 50 years, however, found there was no significant difference.
"A small number of differences in nutrient 4 content were found to exist between organically and conventionally produced foodstuffs 5, but these are unlikely to be of any public health relevance," said Alan Dangour, one of the report's authors.
"Our review indicates that there is currently no evidence to support the selection of organically over conventionally produced foods on the basis of nutritional superiority."
The results of research, which was commissioned by the British government's Food Standards Agency, were published in the American Journal of Clinical Nutrition.
Sales of organic food have fallen in some markets, including Britain, as recession has led consumers to cut back on purchases.
The Soil Association said in April that growth in sales of organic products in Britain slowed to just 1.7 percent in 2008, well below the average annual growth rate of 26 percent over the last decade, following a plunge 6 in demand at the end of the year.
adj.营养的，滋养的
- A diet lacking in nutritional value will not keep a person healthy.缺乏营养价值的饮食不能维持人的健康。
- The labels on food products give a lot of information about their nutritional content.食品上的标签提供很多关于营养成分的信息。
n.健康法，卫生学 （a.hygienic）
- Their course of study includes elementary hygiene and medical theory.他们的课程包括基础卫生学和医疗知识。
- He's going to give us a lecture on public hygiene.他要给我们作关于公共卫生方面的报告。
adj.有系统的，有计划的，有方法的
- The way he works isn't very systematic.他的工作不是很有条理。
- The teacher made a systematic work of teaching.这个教师进行系统的教学工作。
adj.营养的，滋养的；n.营养物，营养品
- Magnesium is the nutrient element in plant growth.镁是植物生长的营养要素。
- The roots transmit moisture and nutrient to the trunk and branches.根将水分和养料输送到干和枝。
食物，食品( foodstuff的名词复数 )
- Imports of foodstuffs accounted for a small proportion of total imports. 食物进口仅占总进口额的一小部份。
- Many basic foodstuffs, such as bread and milk, are tax-free. 许多基本食物如牛奶和面包是免税的。
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有机食品