The health benefits of black grapes have been studied extensively. The chemicals they contain can give you healthier hair and skin, improve your heart health, and even protect your cells against cancer These chemical compounds help protect your cells from damage. They protect against diseases like cancer, diabetes, Alzheimer’s, Parkinson’s, and heart disease. They can also help you heal from illness faste. One of the best-known benefits of resveratrol is improved heart health. You may have read that drinking red wine helps stabilize blood pressure, reduce cholesterol, and lower your risk of heart disease. Scientists think that resveratrol, found in the skins of red and black grapes, is what gives red wine its heart-healthy properties.