Prunes aren’t just high in potassium — they also contain lots of key vitamins. Dried prunes are an important source of the mineral boron, which can help build strong bones and muscles. Try baking some delicious Prune and Raisin Cake for your next party. Fine quality Prunes, imported from USA. Prunes are rich source of Calcium, Vitamins and Minerals. Some even call them a super-food!