Tenten Prunes are made of prunes, sunflower oil and Potassium Sorbate. Prunes contain a good amount of fiber and essential nutrients that can help with digestion, bone health, mineral deficiencies, and other health issues. Prunes are a good source of potassium, an electrolyte that assists in a variety of vital bodily functions. This mineral helps with digestion, heart rhythm, nerve impulses, and muscle contractions, as well as blood pressure. Prunes help in weight management. They do this by keeping you feeling full for longer. The reason for this is likely twofold.