Dry Fruit Hub kishmish black with seeds, having it every day is good for your stomach Raisins contain fibres that start to swell in the presence of water. These give a laxative effect to the stomach and help in relieving constipation. Raisins are found to be rich in polyphenolic phytonutrients which are antioxidants that help in keeping your eyesight strong. Raisins have about 45 milligrams of calcium per 1/2-cup serving. This translates to about 4 percent of your daily needs. Calcium is essential for healthy and strong bones and teeth. Raisins contain healthy vitamins and minerals. They are also fat-free and cholesterol-free, high in antioxidants, and an excellent source of fiber.