One of the largest and best-known prune producers is Sunsweet Growers, headquartered in Yuba City, CA, who control more than 2/3 of the prune market worldwide. In the United States, an effort to rebrand "prunes" as "dried plums" began in 2000, to appeal to a younger market who associated prunes with elderly people. However, only some varieties of plum are called prunes when fresh or dried; others have always been called "dried plums" when dried
Prune juice is made by softening prunes through steaming and then putting them through a pulper to create a watery puree. Prunes and their "juice" contain the natural laxative dihydrophenylisatin (related to isatin). For fast results use heated prune juice. Prunes also contain dietary fiber (about 7%, or 0.07 g per gram of prune). Prunes and prune juice are thus common home remedies for constipation. Prunes also have a high antioxidant content.  In China, the popular summer drink suanmeitang, made with sour prunes, is sometimes thought to have positive effects on acidity in the body.