All prunes are plums, but not every plum is choicest to be a prune. They are good source of potassium the mineral for maintaining normal blood pressure, heart function reduced risks of a stroke. It also promotes bone health slows down muscular degeneration. Prunes also aid in normalizing blood sugar levels, provide an intestinal protection lower cholesterol. Remember to keep prunes fresh by storing them in airtight containers in a cool, dry dark place