Polyphenols are antioxidants that kill free radicals in the blood. Free Radicals are unpaired electrons in the blood that seek out other electrons to pair with, and cause cellular damage. Polyphenols are said to prevent cancer and strengthen the immune system. They can be found in abundance in “Super Foods” like colorful fruits and vegetables. They are also found in cereals, dry legumes, chocolate, red wine, and spices. So eat your fruit and vegetables.