They contain antioxidants like polyphenols and flavonoids that help combat free radicals in the body. High in fiber, black raisins aid in digestion and help prevent constipation. They contribute to heart health by reducing cholesterol levels and improving blood circulation. Black raisins are a good source of calcium and other minerals that support bone health. Their antioxidant properties also promote skin vitality and can help in maintaining a youthful appearance.