Prunes can help play a role in preventing heart disease and chronic diseases because they’re rich in antioxidants, which slow the chemical process of oxidation and protect key cell components from damage. 
Prunes are a deliciously natural way to help maintain energy levels because they’re high in potassium, an essential mineral that helps support cell energy by regulating fluid balance, nerve impulses and muscle contraction.
Prunes are a great source of fiber, and this can help keep hunger pangs at
bay. A diet rich in fiber can help promote fat loss if fiber foods replace
fats and sweets. Plus, four prunes have just 100 calories. 
Prunes are a powerfully functional food because they have prebiotics, which stimulate the growth of healthy bacteria in the large intestine. This helps dietary fiber perform well and promotes immune system and digestive health.
A handful of nutrient rich prunes a day may help bone metabolism and the reversal of bone loss for people with osteoporosis. They may also lead to improved bone formation.
Prunes are rich in soluble fiber, which may play an important role in glucose control. Just a few prunes a day may help normalize blood sugar and insulin levels, and make diabetes more manageable.
Prunes are the all-natural solution to maintaining regularity because
they¹re a great source of fiber. A regular and consistent digestive tract
leads to improved digestive and immune system health.