Dried prunes also known as dried plums are a popular and nutritious snack. They are packed with vitamins minerals and antioxidants making them a healthy addition to your diet.Prunes are a great source of dietary fiber which can help promote digestive health and regulate bowel movements.hey are rich in potassium an essential mineral that helps maintain healthy blood pressure.Prunes contain antioxidants that can help protect your cells from damage caused by free radicals.hey are also a good source of vitamins including vitamin K and vitamin B6 as well as minerals like copper and manganese.