China.org.cn, July 13 — According to a report on the website of the British newspaper The Guardian on July 11, the most comprehensive scientific analysis to date has concluded that organic food is richer in health-promoting antioxidants and contains lower levels of toxic metals and pesticides than ordinary food. บทความมาจากFOFCC-http://fofcc.org.cn/th/11486/
The international team that reached this conclusion suggested that the benefits of switching to organic fruits and vegetables are equivalent to eating one to two extra portions of fruits and vegetables; in general, experts recommend eating five portions of fruits and vegetables a day. บทความมาจากFOFCC-http://fofcc.org.cn/th/11486/
Professor Carlo Leifert of Newcastle University led the project. He concluded that the differences between organic and non-organic food are reflected in both the data and their significance. Organic food has high levels of antioxidants, ranging from 19% to 69%. This is the first study to comprehensively reveal the differences between organic and conventional fruits and vegetables. บทความมาจากFOFCC-http://fofcc.org.cn/th/11486/
The final results of the study have brought to a boil a long-simmering topic, namely that organic food is healthier than ordinary food. บทความมาจากFOFCC-http://fofcc.org.cn/th/11486/
Tom Sanders, a professor of nutrition at King's College London, said the experiment did reveal differences, “but are these natural? Are these related to nutrition? I'm not sure.” บทความมาจากFOFCC-http://fofcc.org.cn/th/11486/
Leifert and his colleagues concluded that many antioxidants “have previously been shown to reduce the incidence of chronic diseases including cardiovascular disease, neurodegenerative diseases, and certain cancers.” But they also said that organic diets have not demonstrated long-term health advantages. บทความมาจากFOFCC-http://fofcc.org.cn/th/11486/
The study also found higher levels of cadmium, a toxic metal, in conventional crops, and conventional crops contained pesticide residues four times those of organic food. Funding for the study was provided by the European Union and an organic farming charity. บทความมาจากFOFCC-http://fofcc.org.cn/th/11486/
The study has also drawn some criticism: for example, one study involved too much data analysis, which inevitably reduced the quality of the research. However, the research team conducted a “sensitivity analysis” and found that the experimental results did not differ greatly. บทความมาจากFOFCC-http://fofcc.org.cn/th/11486/
At the same time, cadmium and pesticides in conventional diets may both affect the experimental data. For example, cadmium can circulate in the human body, and pesticides may be present in cocktails because they may be made from grains containing pesticide residues. บทความมาจากFOFCC-http://fofcc.org.cn/th/11486/
Some other doubts hold that the differences arise from different climates, soil types, and crop varieties, and may not be caused by organic farming. However, some investigators stressed that the experiment had already ruled out other interference. บทความมาจากFOFCC-http://fofcc.org.cn/th/11486/
However, the greatest doubt is directed at the potential health benefits of organic food. Many recent investigations (233 in 2012) were almost unable to substantiate this argument. “The published literature lacks strong evidence to prove that organic food is more nutritious than non-organic food.” บทความมาจากFOFCC-http://fofcc.org.cn/th/11486/
This view was published as early as 2009 in a scientific journal and announced by the UK Food Standards Agency (pdf). The 2012 study only pointed out that organic food contains fewer pesticide residues. บทความมาจากFOFCC-http://fofcc.org.cn/th/11486/
Sanders said he himself would not be influenced by the new results. “Eating organic food does not provide more nutrition,” he said. “What matters is what you eat; whether it is organic or non-organic is not important.” บทความมาจากFOFCC-http://fofcc.org.cn/th/11486/
He added that organic farming has done a very good job of addressing Britain's soil erosion problem and the problem of excessive eutrophication in rivers. บทความมาจากFOFCC-http://fofcc.org.cn/th/11486/
The UK Food Standards Agency (pdf) said that the reasons that motivate consumers to buy organic food include the following: 55% believe it is healthy, and 53% believe it can reduce exposure to chemicals. บทความมาจากFOFCC-http://fofcc.org.cn/th/11486/
But many people believe that environmental factors (44%), animal living conditions (31%), and the taste of food (35%) are also very important. บทความมาจากFOFCC-http://fofcc.org.cn/th/11486/
Browning said: “This survey has aroused people's attention to organic food. In many other countries, organic food and organic farming have received relatively high support and acceptance. We hope that through our findings, the UK can catch up with other European countries.”บทความมาจากFOFCC-http://fofcc.org.cn/th/11486/