As a good source of potassium, prune juice qualifies for a new Food and Drug Administration authoritative health claim that links potassium-containing foods with prevention of hypertension and stroke. Cardiovascular disease is the leading cause of death in the United States. Substantial scientific evidence indicates that the risk of stroke-related deaths is inversely related to potassium intake. By adding a serving of prune juice every day, consumers can increase their intake of this important nutrient.
According to nutrient composition information published by the California Prune Board, 8 ounces of prune juice provides 471 milligrams, or 13 percent, of the Daily Value (3500 milligrams) for potassium. It's also low in sodium, fat, saturated fat and cholesterol.