Red grapes have many health benefits, including: 
Heart health
Grapes contain antioxidants that can lower cholesterol, reduce inflammation, and relax blood vessels. They also contain potassium, which can help with high blood pressure. 
Brain health
Grapes contain resveratrol, an antioxidant that can reduce oxidative stress, which may help with Alzheimer's and Parkinson's disease. 
Blood sugar balance
Grapes are a low glycemic food that may help with insulin regulation and blood sugar balance. 
Digestion
Grapes contain insoluble fiber, which can help regulate bowel movements. 
Bone health
Grapes contain vitamin K, which can help with blood clotting and bone health. 
Immune system
Grapes contain vitamin C, which can help your immune system fight infections. 
Blood pressure
Grapes contain potassium, which can help with high blood pressure. 
Oxidative stress
Grapes contain antioxidants that can help protect cells from oxidative stress, which is linked to cancer and heart disease. 
Grapes are also a good source of vitamins A, D, E, B-1, B-2, and B-6, as well as minerals like copper and manganese.