Antioxidants can be found as vitamins, minerals or phytochemicals. They help repair cell damage caused by free radicals, which can mess with your immune system. Some researchers also believe that free-radical damage may be involved in promoting chronic diseases like heart disease and cancer.
If you're thinking about picking up an 'antioxidant-rich' supplement - don't be fooled. Each fruit and veggie has their own unique combination of various antioxidants - you won't find any of these specialized combos isolated in a pill. Your best bet is to eat a variety of seasonal produce so you can reap all the benefits.