Prunes are a suitable source of fiber, potassium, and vitamins A, K, and B6. They can help with constipation, diarrhea, and other digestive issues. Prunes may also help lower cholesterol and blood sugar levels. Additionally, they contain antioxidants that can help protect your cells from damage. While prunes are generally safe to eat, they may cause digestive issues like gas and bloat in some people. If you undergo these side effects, try eating fewer prunes or soaking them in water before eating.