Antioxidants are nutrients such as vitamin A, (carrots, squash, broccoli, sweet potatoes, tomatoes, kale, collards, cantaloupe, peaches and apricots (bright-colored fruits and vegetables!), vitamin C (citrus fruits like oranges and lime etc, green peppers, broccoli, green leafy vegetables, strawberries and tomatoes ), vitmain E (nuts & seeds, whole grains, green leafy vegetables, vegetable and liver oil) and selenium (fish & shellfish, red meat, grains, eggs, chicken and garlic).
They are important because they prevent slow oxidative damage caused to the body by free radicals (by products) of the oxidating process. Health problems such as heart disease, macular degeneration, diabetes, cancer are all contributed by oxidative damage. They also improve immune defense and lower the risk of cancer or infection. It is good to eat a wide variety of fruits with bright colour and obtain antioxidants from food rather than supplements as well as avoiding oxidative stress from smoking and sunburn.