Antioxidants are substances that may protect your cells against the effects of free radicals — molecules produced when your body breaks down food or is exposed to tobacco smoke and radiation. Free radicals may play a role in heart disease, cancer and other diseases.
Antioxidants, such as vitamins C and E, and carotenoids may help protect cells from damage caused by free radicals. Other naturally occurring antioxidants include flavonoids, tannins, phenols and lignans. Plant-based foods are the best sources. These include fruits, vegetables and their juices, whole-grain products, nuts, seeds, herbs and spices, and even chocolate.
As a bonus, most foods high in antioxidants are high in fiber, low in saturated fat and cholesterol, and good sources of vitamins and minerals. So enjoy the variety.