Grapes are a powerhouse of antioxidants – they contain a wide range of phytonutrients right from carotenoids to polyphenols. Studies have revealed that these phytonutrients help in preventing certain kinds of cancers and help in maintaining heart health. Among polyphenols, resveratrol is known for its miraculous properties such as inhibiting the formation of free radicals that could cause cancer and dilating blood vessels to ease blood flow and lower blood pressure. Point to note: The antioxidant content is the highest in the seeds and the skin. So, do make use of them.