Prunes are dried plums which are basically sweet, chewy, sticky and highly nutritious especially if it has no preservatives. Plums are dehydrated into prunes for the purpose preserving all its nutrients at a much longer time, such as dietary fiber, potassium and antioxidants. Prunes also contain several vitamins like vitamin C, A and B6. There are therefore numerous health benefits of prunes, including mental and dental health. You can eat prunes as snacks and desserts, or make tasty juice.