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Malnutrition1 is responsible for 45% of the global deaths of children under the age of five, research published in the Lancet medical journal suggests.
医学期刊《柳叶刀》上发表的一篇研究称,全球低于五岁的儿童死亡案例中45%是由于营养不良。
They say the first 1,000 days of life - from conception to two years - have lasting4 consequences for health.
Malnutrition - which includes being overweight or obese5 as well as under-nourished - also has an economic impact.
According to a recent United Nations report, malnutrition is estimated to cost the world $3.5tn - or $500 for every person - in healthcare and lost productivity.
A team led by Prof Robert Black, of Johns Hopkins Bloomberg School of Public Health, Baltimore, US, reviewed evidence on maternal6 and child under-nutrition and obesity7 in low-income and middle-income countries since 2008.
The team also assessed national and international progress on nutrition programmes.
Prof Black and colleagues say while some progress has been made in recent years, they estimate that more than 165 million children were affected8 by stunting9 (low height for age) and 50 million by wasting (low weight for height) in 2011.
An estimated 900,000 lives could be saved in 34 countries if 10 proven nutritional10 interventions11 were scaled-up to 90% of the world, they say.
"The nutritional consequences of the months during pregnancy and the conditions during the first two years of life have very important consequences for mortality and for adult chronic12 disease," Prof Black told BBC News.
"The early nutritional deficit13 results in developmental consequences for the individual and that has implications for their ability to succeed in school and ultimately in society to have the most productive jobs."
The researchers warn that countries will not break out of poverty unless nutrition becomes a global priority.
Dr Richard Horton, editor-in-chief of the Lancet, said: "If maternal and child nutrition can be optimised, the benefits will accrue14 and extend over generations, which is why we must work together now to seize this opportunity."
Experts working in development are gathering15 in London this weekend for a summit on nutrition hosted by the UK and Brazilian governments.
This will be followed by the annual summit of leaders from the G8 countries.
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