Four have won the 2016 World Food Prize. The scientists are from the agricultural research the International Potato Center. They won the prize for sweet potatoes. This has resulted in health for millions of people across the world. The scientists developed a to grow sweet potatoes that have extra amounts of Vitamin A in . More Vitamin A means the sweet potato contains extra nutrition. One researcher said it was to get farmers to help him with his work. Many farmers did not think it was a good . The researcher said: "They told me it was a bad idea. Their job was to increase yields, pest resistance and reduce ; it wasn't to improve nutrition."
The sweet potato could change the of many people across the . People without food can die of malnutrition – not having enough to eat. A lack of Vitamin A is one of the most harmful of malnutrition. Scientists say malnutrition affects more than 140 million children up to the of four in 118 countries. It also affects more than seven million women. Scientists also say it is a big reason for children becoming in developing countries. Jan Low, from the International Potato Center, said the prize-winning sweet potatoes could make a big in making hungry people get enough Vitamin A. She hopes scientists will focus on increasing nutrition in .