Plums are very low in Saturated Fat, Cholesterol and Sodium. They're also a good source of Dietary Fiber, Vitamin A and Vitamin K, and a great source of Vitamin C.
Although plums are native to Asia, Europe and America, most U. S. production is in the Japanese varieties which are red and yellow (European varieties are blue and purple).
The difference between plums and prunes is small. Plums are clingstone (the pit does not separate easily from the flesh) and prunes are freestone.
While there are at least 125 prune varieties, most (except for Italian prunes) are grown for drying.