红薯的作用可以和药物媲美

Sweet Potatoes as Medicine 红薯的作用可以和药物媲美

From VOA Learning English, this is the Health and Lifestyle Report.

We Americans have an expression: “If you give a person a fish, they will eat for a day. If you teach a person to fish, they can eat for a lifetime.”

One way to explain this is that helping¹ people grow their own food is a better way to fight hunger. That is the purpose of an agricultural research organization called HarvestPlus.

HarvestPlus is teaching people around the world how to grow what it calls “smart” crops. Its project in Mozambique is having surprising effects.

In 2006, HarvestPlus workers provided orange sweet potato plants to people in 24 Mozambique villages. The workers taught these people how to grow the vegetables. They also explained the importance of Vitamin A to staying healthy.

Farmers in Mozambique had been planting white and yellow sweet potatoes, not the orange-colored ones. The white and yellow potatoes have very little Vitamin A. However, one small, orange sweet potato has a full day’s supply of Vitamin A.

A lack of Vitamin A is dangerous. Without enough Vitamin A, you face an increased risk of getting a serious disease or dying from infections.

Around the world, 190 million young children are not getting enough of this important vitamin in the foods they eat. That number comes from the World Health Organization.

Economist² Alan de Brauw is with the International Food Policy Research Institute. He talks about the HarvestPlus project in Mozambique. He says about 70 percent of children there were Vitamin A deficient³. They were not getting enough Vitamin A.

“About 70 percent of kids under the age of five were vitamin A deficient. So, you have this huge need for new solutions. If you can do something through agriculture to increase the amount of vitamin in the diet … you’re in much better shape because that’s much more sustainable.”

Mr. de Brauw says the potatoes had a surprising effect on the health of children. At the end of the three-year study, the researchers compared the health of children in villages growing orange sweet potatoes with those not growing them.

Children living in the sweet potato villages had 40 percent fewer cases of diarrhea than other boys and girls. Among children under the age of three, the difference was 50 percent. According to Mr. de Brauw showing the impact of a food-growing project on health is very important, or as he says, a big deal.

“This is a big deal because nobody has shown in the past that an agricultural production intervention⁴ can have big health impacts … have had any health impacts.”

Nutrition experts say vitamin supplements – that is, fluids or pills you take in addition to normal meals -- can only do so much. One expert goes so far to say that supplements are a Band-aid -- a short-term fix to a long-term problem.

Anne Herforth is an expert on global food security and nutrition. She was not part of this study but talked about it with VOA’s Steve Baragona on Skype.

“It’s sort of a Band-Aid solution to a more fundamental problem, which is people not having access to high-quality diets.”

Experts are suggesting that linking agriculture and health issues is a natural and effective partnership⁵. They say teaching farmers how to grow healthier food is among the best ways to improve health.

Ms. Herfoth says the findings do a good job making the link between food production and health.

“To say, ‘You know, look, you produce a food and it’s available to people to eat and they like it,' then it does good things for health.”

HarvestPlus is now helping farmers in other countries. In India, the group is helping farmers grow iron-rich millet⁶. And in Bangladesh, it is helping farmers grow high-zinc rice.

Mr. de Brauw helped to write a report on the HarvestPlus project. The report appeared in the journal World Development.

And that’s the Health & Lifestyle Report. I’m Anna Matteo.

Words in This Story

supplement – n. medical : (dietary) a product containing ingredients such as vitamins or amino acids that are taking in addition to food, but are not considered food

deficient – adj. not having enough of something that is important or necessary

diarrhea – n. medical : an illness that causes you to pass waste from your body very frequently and in liquid rather than solid form

impact – n. a powerful or major influence or effect : impact can also be used as a verb

intervene – v. to become involved in something in order to have an influence on what happens : intervention is the noun

millet – n. a type of grass that is grown for its seeds which are used as food

1 helping   

n.食物的一份&adj.帮助人的，辅助的

参考例句：

• The poor children regularly pony up for a second helping of my hamburger. 那些可怜的孩子们总是要求我把我的汉堡包再给他们一份。
• By doing this, they may at times be helping to restore competition. 这样一来, 他在某些时候,有助于竞争的加强。

2 economist   

n.经济学家，经济专家，节俭的人

参考例句：

• He cast a professional economist's eyes on the problem.他以经济学行家的眼光审视这个问题。
• He's an economist who thinks he knows all the answers.他是个经济学家，自以为什么都懂。

3 deficient   

adj.不足的，不充份的，有缺陷的

参考例句：

• The crops are suffering from deficient rain.庄稼因雨量不足而遭受损害。
• I always have been deficient in selfconfidence and decision.我向来缺乏自信和果断。

4 intervention   

n.介入，干涉，干预

参考例句：

• The government's intervention in this dispute will not help.政府对这场争论的干预不会起作用。
• Many people felt he would be hostile to the idea of foreign intervention.许多人觉得他会反对外来干预。

5 partnership   

n.合作关系，伙伴关系

参考例句：

• The company has gone into partnership with Swiss Bank Corporation.这家公司已经和瑞士银行公司建立合作关系。
• Martin has taken him into general partnership in his company.马丁已让他成为公司的普通合伙人。

6 millet   

n.小米，谷子

参考例句：

• Millet is cultivated in the middle or lower reaches of the Yellow River.在黄河中下游地区，人们种植谷子。
• The high quality millet flour was obtained through wet milling.采用湿磨法获得了高品质的小米粉。