Antioxidants play a vital role in overall health by combating oxidative stress caused by free radicals, which can damage cells and contribute to various chronic diseases. Common antioxidants include vitamin C, vitamin E, and polyphenols found in fruits, vegetables, and other plant-based foods. By neutralizing these harmful free radicals, antioxidants help lower the risk of conditions like heart disease and cancer while boosting the immune system. Adequate intake through a varied diet may promote longevity and enhance recovery after physical exertion.