Four have won the 2016 World Food Prize. They won the for making sweet potatoes. The sweet potatoes have extra of Vitamin A. This means they have more . One researcher said farmers didn't want to help at first. The researcher said: "They told me it was a bad ." The farmers said their was to grow potatoes, kill and reduce poverty. They said it wasn't to increase nutrition.
The sweet potato could stop dying from - not having to eat. A lack of Vitamin A is very . Scientists say malnutrition harms 140 million children in 118 . It affects million women and is a big for children becoming blind. The International Potato Center said the prize-winning sweet potatoes could help people get enough Vitamin A. It hopes there will be more with nutrition.