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Four scientists have the 2016 World Food Prize. The scientists from the global agricultural research group the International Potato Center. They won the prize for enriching sweet potatoes. This has in health benefits for millions of people across the world. The scientists a way to grow sweet potatoes that extra amounts of Vitamin A in them. More Vitamin A means the sweet potato contains extra nutrition. One researcher said it was difficult to farmers to help him with his work. Many farmers did not it was a good idea. The researcher said: "They me it was a bad idea. Their job was to yields, pest resistance and reduce poverty; it wasn't to nutrition."

The sweet potato could the lives of many people across the globe. People without food can of malnutrition – not having enough to . A lack of Vitamin A is one of the most harmful examples of malnutrition. Scientists malnutrition affects more than 140 million children up to the age of four in 118 countries. It also more than seven million pregnant women. Scientists also say it a big reason for children becoming blind in developing countries. Jan Low, from the International Potato Center, said the prize-winning sweet potatoes could a big difference in making sure hungry people enough Vitamin A. She more scientists will on increasing nutrition in vegetables.