Tradition’s Health Vision prune nectar is made from dried prunes that contain 60-70% fructose, as well as minerals and provitamin A. According to many studies, the health benefits of prunes and prune juice come from the fact that they contain dietary fiber which is good for intestinal function. Healthy eating habits that include a large variety of fruits and vegetables can help reduce the risk of certain types of cancers. One serving of juice equals approximately two cups of fruit.